Mont Blanc MB M13.21 User manual

1
Service Guide
Haute Horlogerie

32
English 4
Deutsch 50
Français 96
Italiano 142
Español 188
Português 234
Русский 280
日本語 326
中文简体 372
한국어 418

54
Contents
The World of Montblanc 7
Montblanc’s Manufactures: Two Centres of Excellence in Le Locle and Villeret 9
Hand-crafted with respect for tradition 10
“Movements” Centre of Excellence 11
The In-House Balance 13
Montblanc Laboratory Test 500 14
Water-Resistance 15
Calibre MB M13.21 Chronographe Monopoussoir 16
Calibre MB M16.29 and MB M16.24 Chronographe Monopoussoir 20
Calibre MB M66.26 Chronographe Monopoussoir 1/1000th 24
Calibre MB R200 Chronographe Monopoussoir 28
Calibre MB 25.10 Chronographe 32
Calibre MB R230 Exo Tourbillon Chronographe 36
Calibre MB M16.62 Exo Tourbillon Chronographe Rattrapante 40
Calibres MB M29.21 and MB M29.24 Exo Tourbillon Slim 44
Calibre MB M16.68 Exo Tourbillon Suspendu 48
English

76
The World of Montblanc
When the owner of a Montblanc product holds it for the rst time, emotions ow: a mere glance at any
Montblanc product bears witness to the careful selection of materials, the craftsmanship that brought it
into being and the care and patience that were devoted to it. Each Montblanc product is a masterpiece in
itself, designed for those who value traditional and rened methods of fabrication: the art of the crafts-
man perfecting the nib of a fountain pen, the skill of the artisan fashioning leather goods, the creativity
of the goldsmith shaping the perfect jewel or the ultimate precision with which each watch is individually
manufactured in the Montblanc workshops in Switzerland.
It is the passion and artistry of the Montblanc master craftsmen that give each product that very special
something to complement its functional beauty: a soul. The symbol, the icon of the soul, is the white star
Montblanc emblem: a reference to the summit of the highest mountain in Europe. For more than a hun-
dred years, it has stood for the brand’s high aspirations and commitment and, at the same time, for a
higher sense of lifestyle and culture. The star of the Montblanc emblem represents values that have true
relevance in a world of continuous change: timelessness, tradition and durability. Montblanc means tak-
ing time for something of personal importance: thoughts and feelings, beauty and culture.
Time for oneself and for others – and for the most signicant moments in life.

9
Montblanc’s Manufactures:
two centres of excellence in Le Locle and Villeret
Deep in a valley in the Jura, far from the frenzy of everyday life in the modern world, Montblanc set up its two
Manufactures. One, situated in Le Locle, is considered the “Watches and Quality” centre of excellence, while
the other, in Villeret, is the “Movements” Centre of Excellence. In Le Locle, a traditional Swiss chalet harbours
the “Watches and Quality” business, and adheres to an unalterable philosophy: combining Swiss hand-crafted
watchmaking with cutting-edge technology to create outstanding masterpieces.
Their passion for detail is such that a perfect nish is given even to the invisible parts of a watch movement.
The design, development and assembly of every watch are performed with meticulous care in the workshops of
the Montblanc Manufacture in Le Locle.
In addition, the immense laboratory tests all watches to the highest degree of accuracy and quality required by
Montblanc’s demanding standards, to create watches of the most extreme accuracy, durability and perfection.
True to its aim of maintaining Swiss watchmaking at its highest level, Montblanc presents its exclusive
collections of watches that reveal all the talent and devotion of the master watchmakers of Le Locle and the
pride that they take in their art.
8

11
Hand-crafted with respect for tradition
In Villeret, ne watchmaking can boast a long and illustrious history, since it was here that the Minerva
Manufacture was established in 1858, laying the foundations for a tradition lasting 150 years, in the very
same building that houses Montblanc’s workshops today. A heritage that has been handed down unbroken
from generation to generation, and to which the watchmakers of Villeret are still a credit. The timepieces
that they make by hand demand a perfect mastery of watchmaking techniques, an experienced eye and an
intuitive understanding of the soul of a watch. All qualities that develop in the course of a lifetime devoted
to this art.Because such skills are rare, Montblanc determined to preserve them by founding the centre of
excellence dedicated to movements and innovation in Villeret.
“Movements”
Centre of Excellence
In Villeret, the Montblanc watchmaking Manufacture is the centre of excellence dedicated to the
movement, where all the Manufacture’s calibres are developed, from the smallest functional complication
to the innovative “grandes complications”.
Every Montblanc movement represents a bridge linking tradition, performance and excellence.
The calibres are developed in the innovative spirit of today and the tradition of tomorrow.
10

13
The in-house balance:
a far-reaching declaration
Furthermore, the Montblanc watchmaking Manufacture in Villeret is one of the last where the greater
part of traditional watchmaking operations are still carried out by hand, with all that this implies in
micromechanical renement. Thus each timepiece is, in its own way, unique, individually made. Even as
it perpetuates the traditions, the Manufacture innovates continuously in order to ensure regeneration and
ongoing progress in the art of watchmaking and to establish lasting standards of quality and creativity. A
heritage particularly in evidence in the Montblanc Manufacture in Villeret, since its craftsmen apply it in
their working lives every day.
One of the most striking features of Minerva calibres was their unusually large balance-wheel and its high
moment of inertia. It oscillates at the relatively low frequency of 18,000 vibrations per hour, that is to say
the traditional rate of ve vibrations per second, which makes the task of precise regulation all the more
demanding. The heartbeat of a mechanical watch is maintained by its balance-spring, which causes the
balance-wheel to oscillate and determines the accuracy of the watch. These days, most balance-springs are
manufactured industrially, and their length is “counted” electronically. The master watchmakers of Villeret
make their balance-springs themselves and, as in the past, count “by hand” the exact length required for
maximum accuracy. The Montblanc Manufacture in Villeret is one of the few Manufactures in Switzerland
to do this.
12

14 15
Montblanc Laboratory Test 500
The master watchmakers of the Montblanc Manufactures in Villeret and Le Locle create genuine works of
art of great complexity from hundreds of tiny components. Slowly and meticulously assembling delicate
movement parts such as balance-springs, jewels, pallet-forks and pallet-stones, they bring these extremely
precise timepieces to life.
To ensure that their commitment and painstaking work is reected in the lasting quality of their creations,
each watch is subjected to a rigorous programme of tests: the Montblanc Laboratory Test 500.
Over nearly three weeks, 500 hours to be precise, the watches are tested under various conditions that
simulate those that the watch will encounter on its owner’s wrist: daily wear, repeated adjustments by use of
the crown, different climatic conditions and both normal and more brutal use of the various functions.
Only after passing this test, which is attested by the Montblanc Laboratory Test 500 certicate, can the
watches leave the Manufacture. Corresponding perfectly to Montblanc’s rigorous quality standards, they
are assured of long lives on their owners’ wrists. The delivery of a watch is only possible once the quality
assurance team of Montblanc Montre S.A. in Le Locle has been satised that it meets Montblanc’s strict
quality standards. Every watch that passes the Montblanc Laboratory Test 500 is issued with an individual
certicate.
Water-Resistance
The water-resistance of a Montblanc watch is guaranteed to a pressure limit that is specied in bars. Except
for watches guaranteed to a pressure of 10 bars or more, the indication in metres does not correspond to
a diving depth but refers to the pressure at which the water overpressure test was conducted. Furthermore,
the water-resistance of a Montblanc watch may be affected by sudden or repeated water pressure changes
encountered by surface swimmers, by high water temperatures, or by sudden changes in temperature.
Montblanc recommends, therefore, that each Montblanc watch be pressure-checked on a yearly basis by a
Montblanc Service Centre or an authorised retailer.
3 bar (30 m) 5 bar (50 m)
10 bar
(100 m)
Water splashes
Rain
Strong exposure to water
Immersion in water
Free diving

16 17
Calibre MB M13.21
Chronographe Monopoussoir
Available in the Heritage Spirit collection and 1858
It was during the 20th century that the Villeret Manufacture, known at the time by the name of Minerva,
produced the rst wristwatches equipped with a mechanical chronograph. These watches were real
instruments that united a high level of functionality with outstanding mastery of the watchmaker’s art. Fully
produced, decorated and assembled by hand, the calibre MB M13.21 has the distinguishing feature of being
controlled by a single push-piece built into the crown. The chronograph function is displayed through the
central chronograph hand and the 30-minute counter at 3 o’clock.
Under its screwed sapphire-crystal back, the calibre reveals its watch-plate and bridges in German silver and
its steel parts hand-chamfered by the master watchmakers of the Montblanc Manufacture in Villeret.
The calibre MB M13.21 comprises a classical gear train with horizontal clutch-wheel, a column-wheel to
control the chronograph functions and a large screwed balance-wheel, 14.5 mm in diameter, with a high
moment of inertia of 59 mg.cm², oscillating at a frequency of 18,000 vibrations per hour (2.5 Hz).
Its power reserve is about 50-55 hours and ensures remarkable wearing comfort.
Calibre MB M13.21

18 19
Crown
1: Running and manual winding position.
To rewind, rotate crown clockwise .
2: Setting the time
Pull the crown out to position 2 to set the time. You can turn the crown in either direction.
Normal chronograph function
a) Starting the chronograph
Press the monopusher (P1) a rst time to set the chronograph direct-drive seconds hand (C) and the
minutes-counter hand (E) in motion.
b) Stopping the chronograph
When you press the monopusher (P1) again, the chronograph hands will stop. Now, you can read the
elapsed time. The chronograph direct-drive seconds hand performs one full revolution in 60 seconds.
When the direct-drive seconds hand passes the 12 o’clock marker, the minutes-counter hand (E) advances
by one graduation (1 minute). It can count up to 30 minutes. To measure longer intervals, make a note of
the number of full revolutions of the minutes-counter hand.
c) Resetting the chronograph to zero
After you have completed the measurement, press the monopusher (P1) a third time to reset the
chronograph direct-drive seconds hand and the minutes-counter hand to zero. This prepares your
chronograph for a new measurement.
Pulsometer display and functions
The pulsometer scale is graduated for 30 pulsations. Start the chronograph function when you begin to
feel the pulse. Stop the chronograph at the thirtieth pulsation. The tip of the direct-drive seconds hand (C)
indicates the point on the pulsometer scale displayed around the dial perimeter which corresponds to the
number of pulsations per minute.
Tachymeter display and functions
The tachymetric scale (F) serves to measure the average speed of a vehicle, for example, over a given distance
(a kilometre or a mile), and the time elapsed. Start the chronograph function at the beginning of the rst
kilometre or mile. Stop the chronograph when you reach the end of the chosen distance. The tip of the direct-
drive hand (C) shows the average speed of the vehicle.
Calibre MB M13.21
Chronographe monopoussoir
Available in the Heritage Spirit collection and 1858
A: Hours hand
B: Minutes hand
C: Chronograph direct-drive seconds hand
D: Continuous seconds hand
E: Minutes-counter hand (30 min)
F: Pulsometer or tachymetric scale
P1: Monopusher
A
E
F
B
C
D
P1

21
Calibres MB M16.29 and MB M16.24
Chronographe Monopoussoir
Available in the 1858 and TimeWalker collections
The new Montblanc Manufacture Calibre MB M16.24 showcases ne watchmaking down to the very last
detail. Inspired by the Minerva monopusher chronograph 17.29 of a size of 17 lines (circa 38 mm) developed
in 1929 and reworked in the 2000’s as calibre MB M16.29. The new version allows to indicate the time
on a 24-hour scale on a dedicated minute track thanks to an exclusive and unique red central hand coated
with SuperLumiNova®. This hand-crafted Monopusher chronograph movement is composed of a large
balance wheel with 18 screws beating at the traditional frequency of 18,000 A/h as well as a column wheel
and horizontal coupling. It features the iconic V-shaped chronograph bridge and the Minerva arrow, paying
tribute to its heritage. The bridges are decorated with “Côtes de Genève”, circular graining on both sides and
hand-chamfered edges – a perfect example of nest watchmaking.
Calibres MB M16.29 and MB M16.24
20

22 23
F
AC
D
E
B
P1
G
C
D
E
F
P1
A
B
D
F
P1
C
E
Crown
1: Running and manual winding position.
To rewind, rotate crown clockwise .
2: Setting the time.
Pull the crown out to position 2 to set the time. You can turn the crown in either direction.
Normal chronograph function
a) Starting the chronograph
Press the monopusher (P1) a rst time to set the chronograph direct-drive seconds hand (C) and the
minutes-counter hand (E) in motion.
b) Stopping the chronograph
Press the monopusher (P1) again to stop the chronograph hands. Now, you can read the elapsed time.
The chronograph direct-drive seconds hand performs one full revolution in 60 seconds. When the
direct-drive seconds hand passes the 12 o’clock marker, the minutes-counter hand (E) advances by one
graduation (1 minute). It can count up to 30 minutes.
To measure longer intervals, make a note of the number of full revolutions of the minutes-counter hand.
c) Resetting the chronograph to zero
After you have completed the measurement, press the monopusher (P1) a third time to reset the
chronograph direct-drive seconds hand and the minutes-counter hand to zero. This prepares your
chronograph for a new measurement.
Tachymeter display and functions
The tachymetric scale (F) serves to measure the average speed of a vehicle, for example, over a given distance
(a kilometre or a mile), and the time elapsed. Start the chronograph function at the beginning of the rst
kilometre or mile. Stop the chronograph when you reach the end of the chosen distance. The tip of the direct-
drive seconds hand (C) shows the average speed of the vehicle.
Pulsometer display and functions
The pulsometer scale is graduated for 30 pulsations. Start the chronograph function when you begin to feel
the pulse. Stop the chronograph at the thirtieth pulsation. The tip of the direct-drive seconds hand indicates
the point on the pulsometer scale displayed around the dial perimeter that shows the corresponding number
of pulsations per minute.
Calibres MB M16.29 and MB M16.24
Chronographe Monopoussoir
Available in the 1858 and TimeWalker Collections
A: Hours hand
B: Minutes hand
C: Chronograph direct-drive seconds hand
D: Continuous seconds hand
E: Minutes-counter hand (30minutes)
F: Tachymetric or pulsometer scale
G: Hours and minutes hand (24-hour display)
P1: Monopusher

24 25
Calibre MB M66.26
Chronographe Monopoussoir 1/1000th
Available in the TimeWalker Collection
For more than one hundred years, the Minerva Montblanc Manufacture in Villeret has belonged to a tight
circle of renowned manufacturers whose chronographs are designed to measure short intervals of time with
unparalleled precision. In 1916, Minerva pioneered a mechanical chronograph that guaranteed accuracy
to the hundredth of a second via a hand needing just three seconds to make its way around the dial. This
instrument, reworked in 1936 with the large chronograph seconds hand achieving one revolution per
second, represented an essential source of inspiration for the design of calibre MB M66.26 Chronographe
Monopoussoir 1/1000th.
This calibre is equipped with two balance-wheels: the rst is a large screwed balance-wheel that beats at a
frequency of 18,000 vibrations per hour (2.5 Hz) for time indications; the second is a small balance-wheel
that oscillates at a frequency of 360,000 vibrations per hour (50 Hz) for chronograph indications.
As such, it accomplishes 100 back-and-forth movements every second (50 in one direction and 50 in the
other). However, on calibre MB M66.26 this tempo not only determines the movement of the direct-drive
seconds hand but delivers an impulse as well, with which a new type of wheel – known as a 1/1000th mobile
– is sent into rotation within the gear-train. Driven by this device, it turns around its axis at a uniform speed
of ten revolutions per second, thus providing the relation with which the hundredth of a second can be
further divided into ten equal parts.
The chronograph function is controlled by means of a column wheel consisting of two levels, the rst of
which controls the starting, stopping and resetting of the hundredths of the balance-wheel while the second
is devoted to the control of the 1/1000th mobile.
Calibre MB M66.26 features a power reserve of 100 hours for time indication and 45 minutes for the
chronograph indication.
Calibre MB M66.26

26 27
Crown
1: Running and manual winding position.
To rewind the time-display mechanism, rotate the crown clockwise .
To rewind the chronograph, rotate the crown anticlockwise . Stop turning the crown once you feel
resistance.
2: Setting the time.
Pull the crown out to position 2 to set the time. You can turn the crown in either direction.
Chronograph function
The timepiece features a chronograph mechanism that allows measurement of intervals from 1/1000th of a second
to 15 minutes. For this purpose, it uses a 1/1000th counter hand (G), 1/100th chronograph direct-drive seconds
hand (D), a seconds-counter hand (E) and a minutes-counter hand (F). It is a monopusher chronograph, i.e. the start,
stop and zero-reset functions are activated as you repeatedly press the monopusher (P1).
P1: a) Starting the chronograph
Check that the chronograph function has sufcient autonomy via the power reserve display (H).
Press the monopusher to set the chronograph function in motion. The direct-drive seconds hand (D), seconds-
counter hand (E), minutes-counter hand (F) and power-reserve counter hand (H) are working. The 1/1000th
counter hand (G) remains neutral until the chronograph is denitively stopped, at which point it will be
possible to read the 1/1000th of a second.
b) Stopping the chronograph
Press the monopusher (P1) again to stop the chronograph function. The time elapsed can be read. Begin by
rst reading the minutes-counter hand (F), then the seconds-counter hand (E) and the 1/100th hand (D), and
nally the 1/1000th counter hand (G).
c) Resetting the chronograph to zero
After you have completed the measurement, press the monopusher (P1) a third time to reset the 1/1000th
counter hand (G), the chronograph direct-drive seconds hand (D), the seconds-counter hand (E) and the
minutes-counter hand (F) to zero.
Calibre MB M66.26
Chronographe Monopoussoir 1/1000th
Available in the TimeWalker Collection
A: Hours hand
B: Minutes hand
C: Small-seconds disc
D: Chronograph direct-drive seconds hand
(1/100th)
E: Seconds-counter hand
F: Minutes-counter hand (15 min)
P1: Monopusher
H: Chronograph power reserve
G: 1/1000th counter hand
A
B
C
F
H
P1
E
G
D

28 29
Calibre MB R200
Chronographe Nicolas Rieussec
Available in the Star Legacy Collection
The Montblanc Nicolas Rieussec shows the time in two different time zones at a glance: the owner’s home
country time and the local time in their present location. A window display tells them whether it is day or
night in their home country, while another aperture shows the date. Short periods of time can be measured
on the two rotating counter discs with the help of two xed pointers.
The MBR200 calibre features a rotor tted with a heavy metal weight to maximise its winding efciency.
It supplies energy to two barrels, which provide 72hours’ continuous running. The chronograph is
controlled by a traditional column wheel, which denes the positions of the levers and activates the start,
stop and reset functions. With its high moment of inertia and a frequency of 28,000 vibrations per hour
(4Hz), the large screwed balance wheel delivers an extremely stable rate.
Calibre MB R200

30 31
Crown
1: Position for running and manual winding. To rewind the watch, rotate crown clockwise .
2: a) To set the watch
Pull the crown into position2 to move the hours hand of the second time zone (local time (A)) so that
it is superimposed on the hours hand (home time (C)). Pull the crown out to position3 to stop the
movement. Set the desired time. The day/night display (F) is synchronised with home time (C) and will
indicate, for example, whether it is 3a.m. or 3p.m.
b) Setting the date
Pull the crown into position2 and rotate it clockwise or anticlockwise . The date is
synchronised with local time (hours hand (A)).
3: Adjustment of home time
The movement stops and both hours hands remain together while the minutes hand is set. The day/night
display (F) follows.
To set the second time zone (local time (A)).
Pull the crown into position2 and rotate it clockwise or anticlockwise . The second time zone
hours hand will jump from hour to hour until the desired time is set. The date follows, but home time does
not, and the movement does not stop.
Functions
P1:Monopusher. Press repeatedly for access to the start, stop and zero-reset functions. One press on the
push-piece starts the seconds disc. Another press stops the mechanism to allow reading of the time on the
seconds disc and the 30-minute counter. A third press resets both counters to zero: the watch is ready to
time the next action.
Calibre MB R200
Chronographe Nicolas Rieussec
Available in the Star Legacy Collection
A: Hours hand (local time)
B: Minutes hand
C: Hours hand (home time)
D: Seconds counter (60seconds)
E: Minutes counter (30minutes)
F: Day/Night display (synchronised with
home time)
G: Date (synchronised with local time)
P: Monopusher
F
PG
B
C
ED
A

32 33
Calibre MB 25.10
Chronographe
Available in the TimeWalker Collection
Comprising 232 components, the Manufacture calibre MB 25.10 unites all the characteristics of the
upmarket watchmaker’s art. Thus the chronograph mechanism is controlled by a traditional column wheel, a
classical horizontal clutch-wheel and a stop-seconds mechanism for precise setting of the time.
The “3-6-9” or “Tri-Compax” layout of the chronograph counters is reminiscent of traditional chronograph
displays.
The 10 mm diameter screwed balance wheel, with a moment of inertia of 12 mgcm², oscillates at a frequency
of 28,000 vibrations per hour (4 Hz). Its power reserve is about 46 hours.
Finely crafted nishes such as Geneva Stripes, circular graining and blued screws combine with the
modernity of a thoroughbred-style rotor. The monobloc weight is machined from tungsten and decorated
with black rhodium, lending it the appearance of a racing-car steering wheel.
Calibre MB 25.10

34 35
Crown
1: Running and clockwise manual winding position .
2: Setting the date.
3: To set the time to the nearest second, the seconds hand can be stopped in this position.
Special Functions
P1:Starting and stopping of the chronograph: A single press starts the direct-drive seconds hand (D). After
one minute, the minutes-counter hand (E) jumps one minute, in contrast to the hours counter (F), which
is dragging (thus indicating which half hour is in progress). A second press stops the chronograph
function.
P2:Resetting the chronograph to zero. Pressing the push-piece once returns the three chronograph hands
(direct-drive seconds (D), minutes-counter (E), hours counter (F)) to zero. The chronograph must be
stopped before this function can be used (see P1).
Tachymeter display and functions
The tachymetric scale (H) serves to measure the average speed of a vehicle, for example, over a given
distance (a kilometre or a mile), and the time elapsed. Start the chronograph function at the beginning of the
rst kilometre or mile. Stop the chronograph when you reach the end of the chosen distance. The tip of the
direct-drive seconds hand (D) shows the average speed of the vehicle.
N.B.: Setting 2 (G) cannot be changed manually between 8p.m. and 2a.m. Any alteration made during this
period may damage the movement.
Calibre MB 25.10
Chronographe
Available in the TimeWalker Collection
A: Hours hand
B: Minutes hand
C: Seconds hand (small seconds)
D: Chronograph (direct-drive) seconds hand
E: Chronograph minutes counter (30minutes)
F: Chronograph hours counter (12hours)
G: Date
H: Tachymetric scale
BA
E
F
H
CD
G
P1
P2

36 37
Calibre MB R230
Exo Tourbillon Chronographe
Available in the Heritage Chronométrie and TimeWalker Collections
The calibre of the Exo Tourbillon Minute Chronographe combines two of the most important
chronometric complications: a chronograph for measuring short time intervals and a tourbillon of patented
design for absolute precision.
This calibre has a large balance-wheel oscillating at 21,600 vibrations per hour (3Hz), located outside the
tourbillon cage. This innovative and patented mechanism is called “Exo Tourbillon” from the Greek prex
“exo”, meaning “external” or “exterior”.
The advantage of this construction is that it allows the use of a smaller, and therefore lighter, cage, needing
less energy to drive its rotating motion. The rotating cage is also relieved of the weight of the screwed
balance: this technical feat further reduces the energy required since the balance, isolated from the rotating
cage, is not disturbed by the cage’s inertia. In addition, the calibre features a stop-seconds
function that stops the screwed balance-wheel directly, by means of a small spring. Such a device rarely
accompanies a tourbillon and is very useful when the wearer wishes to make a precise adjustment, not only
of the hours and minutes hands, but of the seconds hand as well. This innovative design is built into the
chronograph calibre, manufactured in-house, which combines all the elements of a traditional chronograph
with a contemporary, high-performance construction: a monopusher model with a column-wheel, a precise
and efcient vertical clutch, automatic winding and a double barrel.
Its power reserve is about 45-50 hours and it ensures remarkable wearing comfort.
Calibre MB R230

38 39
Crown
1: Running and manual winding position.
To rewind, rotate crown clockwise .
2: Setting the date (C).
3: Setting the time (A) in a clockwise or anticlockwise direction .
To set the time to the nearest second, the tourbillon can be stopped in this position by use of the guide-
mark (F).
Special Functions
Setting the time
Position 3: turn the crown clockwise or anticlockwise to display the time required.
Setting the date
Position 2: turn the crown clockwise or anticlockwise to display the date required (C).
Use of the chronograph
P1: Monopusher. Press repeatedly for access to the start, stop and zero-reset functions. One press on the
push-piece starts the seconds hand. Another press stops the mechanism to allow reading of the time on
the seconds hand and the 30-minute counter. A third press resets both counters to zero: the watch is
ready to time the next event.
Calibre MB R230
Exo Tourbillon Chronographe
Available in the Heritage Chronométrie and TimeWalker Collections
A: Hours hand
B: Minutes hand
C: Date hand
D: Seconds counter (60 seconds)
E: Minutes counter (30 minutes)
F: Stop-seconds guide-mark
P1: Monopusher
C
A
P1
D
F
E
B