Eberhard Chrono 4 21-42 User manual

USER MANUAL

T he Eberhard & Co. watch manufactory was founded
by Georges-Lucien Eberhard at La Chaux-de-Fonds back
in 1887. Ever since, the venture has specialised in the
making of chronographs.
In this capacity, it has attained a highly respected
position in the world of high-grade watches. With the
introduction, at a later stage, of sportively elegant
watches it has furthermore augmented this status of
the Eberhard & Co. brand name.
Eberhard’s success story is backed by consistent
deployment of advanced technology, meticulous
craftsmanship and, not least, by observing that long
tradition of superior workmanship which has made
Swiss watchmaking a household name.
Today, with well over a century gone by, watches by
Eberhard & Co. continue to stand for that high-grade
quality and those excellent virtues which will please
even the most demanding of connoisseurs.
Today the historic Eberhard & Co. headquarters, at 73
Avenue Léopold-Robert, house the brand museum,
which can be visited by appointment.

Eberhard & Co. celebrates 20 years of Chrono 4. After having entirely transformed the reading of time
at the dawn of the new millennium, this iconic model is the first and only chronograph in the history of
watchmaking to boast 4 aligned counters, thanks to a patented device and a registered design.
To mark such an important anniversary, the Chrono 4 collection is set to be enriched with a new piece:
“Chrono 4 21-42”, the lucky numbers recalling the year of the launch and the size of the case. Available in two
different choices of bezel, combined with dials featuring different patterns (soleil or clous de Paris), but all
with azuré finished counters,“Chrono 4 21-42”can be paired with a strap in either alligator leather or rubber,
or with the Chaque steel bracelet.
“Chrono 4 21-42”: twenty years of history, twenty years of success and innovation.
We hereby guarantee your Eberhard & Co. watch against any defect in manufacture or materials for a period
of 24 months from the date of purchase, subject to normal conditions of use.
This guarantee does not cover:
• damage, including indirect damage, caused by shocks, falls or incorrect use of the watch
• wear and tear of the strap, glass, battery or any other part of the watch due to normal use
• watches whose reference or matriculation number has been worn away or altered, or Shield Cards that
have not been correctly activated
• work carried out on the watch or strap by non-authorised persons or alterations made to the watch that do
not respect its original configuration
• damage caused by the failure to check the watch’s water resistance
To have your Eberhard & Co. watch serviced or repaired, please contact one of our service centres or an
authorised retailer and present your Shield Card, filled in and complete with the activation PIN.
We recommend a check-up or overhaul at the following intervals:
• mechanical watches: on average every 3 years, depending on the conditions of use.
• quartz watches: when the battery is flat. A battery should always be replaced immediately when it is
exhausted.
For more information, please visit eberhard1887.com

M
D
H
I
G
A
E
C
F
B
A Push button to start and stop the chronograph
B Push button for setting to zero all hands of the
chronograph
C Winding crown
D Hours-hand of the watch
E Minutes-hand of the watch
F Small continuous seconds-hand
G Centre seconds-hand of the
chronograph
H Small minutes-hand of the chronograph
I Small hours-hand of the chronograph
L 24-hours indicator
M Date
N Tachometer scale base/1000
N
L
Patented-Registered Design

M
D
H
I
G
O
A
E
C
F
B
A Push button to start and stop the chronograph
B Push button for setting to zero all hands of the
chronograph
C Winding crown
D Hours-hand of the watch
E Minutes-hand of the watch
F Small continuous seconds-hand
G Centre seconds-hand of the
chronograph
H Small minutes-hand of the chronograph
I Small hours-hand of the chronograph
L 24-hours indicator
M Date
N Tachometer scale base/800
O Scale featuring 1/5 markings
N
L
Patented-Registered Design

FEATURES
Mechanical chronograph with automatic winding and an exclusive device by Eberhard & Co. in the form
of four counters aligned in one row. The crown is screwed in and water-resistant, the sapphire glass is
vaulted, the caseback is fixed by 6 screws. The special sword-shaped hands and the “appliqué” hour
indexes are marked by luminescent points to allow read-off when it’s dark.
From this collection, the following versions are available:
– Case in stainless with steel or ceramic bezel, with rubber strap alligator leather strap with stainless
steel buckle personalised E&C or deployment clasp Déclic (Patented) or the “Chaque” steel bracelet.
Water-resistant to 50 m.
READING THE DIAL
On the “Chrono 4 21-42” dial there are 4 counters, arranged in one row, having the following functions:
– Small minutes-hand of the chronograph H
– Small hours-hand of the chronograph I
– 24-hours indicator L
– Small continuous seconds-hand F
The chronograph seconds are displayed by the centre-hand G
The calendar is positioned at 12 o’clock M
DISTINCTIVE FEATURES OF THE MOVEMENT
Chronographic automatic movement, 28,800 vibrations per hour
– Micrometric regulator
– “Glucydur” balance for regulating the movement (the inoxidizable alloy of which has a low coefficient
of expansion), combined with a self-compensating spiral; it is hence insensitive to temperature
fluctuations and ensures an optimum regulation of the movement
– Number of rubies: 37
– 42-hours power-reserve under optimum conditions
Exclusive device by Eberhard & Co. with counters arranged in a row
– Number of rubies: 16

OPERATING THE CROWN
IMPORTANT
To set back the crown, push it lightly against the watch case while turning it clockwise until it is fully
screwed in again.
POSITION A - Screwed-in crown, water-resistance guaranteed.
POSITION B - HAND-WINDING OF THE WATCH – To unscrew the crown turn it
counter-clockwise. When it is unscrewed, turn it clockwise to transmit
the manual charge to the movement. If your “Chrono 4 21-42” has not
been worn for some time, the movement has to be wound manually, in
order to obtain immediately a sufficient power-reserve and to ensure
accurate working of the watch.
POSITION C - RAPID DATE-SETTING – Pull the crown to the first catch. Turning the
crown counter-clockwise, you can then set desired date.
POSITION D -TIME SETTING – To set the time (hours and minutes), pull the crown to
the second catch.

OPERATING INSTRUCTIONS FOR THE CHRONOGRAPH
Press the push-button A to start the chronograph mechanism. Press the push-button a second
time to stop the chronograph mechanism. You can now read on the counters how many seconds G ,
minutes H and hours I have elapsed. Press the push-button again and the chronograph will restart
from the intermediate stop. To return to zero, the chronograph must be in the stop position. Press the
second push-button B and all hands will return to zero. You are advised not to leave the chronograph
mechanism operating continuously.
PUSH-BUTTONS
Make sure push-buttons are always pressed in the following order:
A : start
A : stop
B : return to zero
Abide by this sequence quite severely so as to preclude damage to the mechanism.
Never make use of the push-buttons under water since they are not watertight while being pressed.
TACHOMETER SCALE (VERSION WITH STEEL BEZEL)
The outer rim on the dial shows the data needed for metering the speed of a vehicle over a distance of
1,000 metres.
The moment the vehicle passes the first reading marking the beginning of said 1,000m distance, activate the
hand G of the chronograph to bring it to a stop the moment the vehicle passes the second reading mark. Said
hand G will now indicate the average speed reached in km/h in tune with the tachometer scale.
Example: when one kilometre is covered within 45 seconds, the average speed displayed by the centre
seconds-hand G on the tachometer scale will be tantamount to a speed of 80km/h.
TACHOMETER SCALE (VERSION WITH CERAMIC BEZEL)
The tachometer scale on the ceramic bezel shows the data needed for metering the speed of a vehicle over
a distance of 1,000 metres.
The moment the vehicle passes the first reading marking the beginning of said 1,000m distance, activate the
hand G of the chronograph to bring it to a stop the moment the vehicle passes the second reading mark. Said
hand G will now indicate the average speed reached in km/h in tune with the tachometer scale.
Example: when one kilometre is covered within 45 seconds, the average speed displayed by the centre
seconds-hand G on the tachometer scale will be tantamount to a speed of 80km/h.

SCALE FEATURING 1/5 SECOND MARKINGS (VERSION WITH CERAMIC BEZEL)
The subdivision of the seconds reading space into 5 parts ( O ), allows to detect an observation time not
approximated to the second, but in the 1/5 of a second.
CARE OF WATERPROOF WATCHES
The Chrono 4 “21-42” model can be worn in the shower, for diving and snorkelling, but is not designed for
deep water diving. Be careful not to pull out the crown when the watch is wet. It is recommended that the
watch’s waterproofing is checked annually at one of our authorised service centres, who will inform you if
the seals need to be replaced.