Sinn 756 User manual

MODEL SERIES 756

CONTENTS
SINN SPEZIALUHREN ZU FRANKFURT AM MAIN
THE DUOCHRONOGRAPH 756
THE DUOCHRONOGRAPH 756 DIAPAL
INSTRUCTIONS FOR USE
Ar-DEHUMIDIFYING TECHNOLOGY
USING THE CHRONOGRAPH TO MEASURE TIME
ASSEMBLING AND ADJUSTING
THE LENGTH OF STRAPS
TECHNICAL DETAILS
SERVICE
6 – 9
10 – 11
12 – 13
14 – 17
18 – 19
20 – 21
22 – 27
28 – 31
32 – 33

4
DEAR CUSTOMER,
We know from numerous
conversations that the people
who buy our watches do so out of
conviction. This includes people with
a pronounced affinity to technology
who are fascinated, for example,
by the solutions we have devised
for protection from magnetic fields
and scratch resistance. Some of our
customers, such as divers, pilots and
the German GSG 9 special police
unit, rely on their watches in their
respective careers because their lives
depend on it.
They all swear by the performance,
resilience and durability, as well
as the quality and precision of our
watches. That is why the world’s
largest classification society DNV GL
(formerly Germanischer Lloyd,
Hamburg) regularly tests and certifies
the water and pressure resistance of
our diving watches.

5
We have selected pilot’s watches tested and certified to the technical
standard for pilot watches (Technischer Standard Fliegeruhren – TESTAF) by
Aachen University of Applied Sciences. The TESTAF ensures that a pilot’s watch
meets all timekeeping requirements during flight operations in accordance
with visual and/or instrumental flight regulations and is suitable for professional
use. Functionality is our top priority and ultimately determines the design. Only
the technical features that are really needed can be found on our watches.
Because we believe that products have to speak for themselves.
The basic question that we ask ourselves is: which innovative technologies
and materials can be employed for our craft and provide solutions for
rendering our watches even more practical for everyday use? It is often
worth indulging in a little lateral thinking to see what is going on in other
industrial sectors or fields of science. We repeatedly go to the limits of physical
resources to upgrade our watches – with the aim of making what’s good
even better. Most of our best developments are yet to come!
I am delighted that you have decided to buy a SINN timepiece and hope
that it will continue to give you pleasure for many years to come.
Yours sincerely,
Lothar Schmidt

6
SINN SPEZIALUHREN ZU FRANKFURT AM MAIN
It was back in 1961 that pilot and blind-flying instructor Helmut Sinn founded
the company. Since then, we have been committed to producing high-
specification mechanical watches. In 1994, the graduate engineer Lothar
Schmidt took over the company. This marked the beginning of a new era
for the SINN brand, because the new owner took a decisive step towards
more innovation. Under his leadership, new technologies and materials were
introduced, thus providing the crucial incentives for our company’s evolution
and gradual emergence as an insider’s tip for lovers of fine watches. Today,
our name stands for technical innovations – much to the delight of both the
trade and our customers alike.

7
Advancements in endurance testing
Take, for example, the absolutely condensation-
free, anti-reflective, German Submarine Steel diving
watch – made possible by HYDRO Technology.
Other examples include a chronometer
chronograph fashioned from a 22-carat gold
alloy that is as hard as stainless steel and a
chronometer with a magnetic resistance of
up to 80,000 A/m. There are also watches with
a clockwork mechanism optimally protected
from aging by an inert gas and integrated
dehumidifying capsule. The list would not be
complete without mentioning the development of
mission timers (Einsatzzeitmesser or EZM in German)
for firefighters, for special police units and border
patrol guards as well as Temperature Resistance
Technology to keep mechanical watches
performing at temperatures ranging from − 45 °C
to + 80 °C. This technology has proven its worth in
the EZM 10 TESTAF model, for example, used as
part of the official approvals procedure for Airbus
Helicopters (formerly Eurocopter) EC 145 T2 high-
performance helicopter. Hot and cold climate tests
and high-altitude experiments were carried out in
the deserts of the USA, the Rocky Mountains and
the frozen wastes of Canada. The watch was worn
unprotected, outside the pilot’s overall, during cold
climate tests at temperatures reaching − 45 °C.

8
Innovations and certifications
The world’s largest classification society for maritime safety DNV GL (formerly
Germanischer Lloyd, Hamburg), has been testing our diving watches
for pressure and water resistance since 2005. As part of DNV GL’s official
certification process, our diving watches have been treated as part of diving
equipment since 2006 and tested and certified in accordance with European
diving equipment standards. This is unparalleled in the watch industry.
We have had selected pilot’s watches tested and certified to the technical
standard for pilot watches (Technischer Standard Fliegeruhren – TESTAF)
by Aachen University of Applied Sciences since 2012. The TESTAF, the result
of a research project at the initiative of Sinn Spezialuhren, ensures that a
pilot’s watch meets all timekeeping requirements during flight operations in
accordance with visual and/or instrumental flight regulations and is suitable
for professional use.
DIAPAL is one of our most important technological developments, with oiling
no longer needed for the most important functions in the watch thanks to
the materials we select. This technology was first used in 2001. With the aid
of TEGIMENT Technology, we achieve greatly increased scratch resistance
through surface hardening.

9
Ongoing advancement in technology and quality
Our top priority has always been to develop watches that offer superior
performance – both in daily and in professional use. Which is why our
engineers are working continually to identify which innovative methods,
materials and technologies are best suited for optimising our watches.
Each new development has to first undergo rigorous practical tests before
being incorporated. And no watch leaves our workshops before it has
been subjected to thorough checking and fine adjustment by our master
watchmakers.
Workshop modifications and hand-engraving
From the robust case and the polished crystal
through to elaborate refinements: we make sure
that each and every detail of our watches is fit
for purpose. The same applies to our workshop
modifications. Only the perfect interaction of all
components and technologies ensures that our
watches can meet all their design specifications
in full. Take for example the SZ02 calibre of our
U1000 diving chronograph. The 60-minute scale
of the stopwatch minute counter is much simpler
and more intuitive to read than the 30-minute
scale commonly found on other watches. The
hand-engraving represents a highly personal form
of refinement. If required, our specially trained
engraver can etch a name, initials, monograms
or symbols onto the rotor, movement bridge and
case back.

10