Sinn Timepieces: Sinn Technology

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Instrument Watch - Model 240 St (Basel 2015)

Model 240 St

A sporty watch with interior's pilot bezel

Key functions and clarity are the all-important features of the 240 St. With its classic design based on traditional styles, the 43 mm diameter 240 St is distinguished by those unique characteristics which mark it clearly as a Sinn watch.
These include a resistance to low pressure and pressure resistance up to 10 bar. The interior pilot’s bezel with luminous triangular main marker enables precise monitoring of defined periods of time. The case made of bead-blasted stainless steel features a sapphire crystal glass. Perfect readability, even at night, is ensured by the luminous hands and indices. The 240 St also features the date and weekday, which can be displayed in German or English simply by adjusting the crown.

Case made of stainless steel, bead-blasted

Interior pilot's bezel

Sapphire crystal glass

Pressure-resistant to 10 bar

Low pressure resistant

Technical Data:

SW 220-1
Self-winding mechanism
26 bearing jewels
28,800 semi-oscillations per hour
Seconds stop function
Shock resistant as per DIN 8308
Anti-magnetic as per DIN 8309

Case

Case made of stainless steel, bead-blasted
Sapphire crystal glass in front, anti-reflective on both sides
Case back screw-fastened
Meet the technical requirements for waterproofness, as set out in standard DIN 8310
Pressure-resistant up to 10 bar
Low pressure resistant

Functions

Hours, minutes, seconds
Date
Day of the week display
Interior pilot’s bezel with luminous key mark

SINN Technologies

Crown with D3-System

Dimensions and Weight

Case diameter 43 mm
Band lug width: 22 mm
Case thickness: 11 mm
Weight without strap: 85 gramme

Dial and Hands

Matte black dial
Indices coated with luminescent colour
Hour- and minute hand coated with luminescent colour

Warranty

2 years

Sinn U1-D (The Hour Glass Special Edition)

Sinn U1-D

Ultimate 1-Dune

Special Edition of 350 pieces - Exclusive to The Hour Glass

Movement:

Mechanical movement

Self-winding mechanism

26 bearing jewels

28,800 semi-oscillations per hour

Shock-resistant according to DIN 8308

Anti-magnetic according to DIN 8309

Case:

Case made of German submarine steel with Black Hard Coating and TEGIMENT® Technology, making it especially scratch-resistant

Captive diver’s bezel with TEGIMENT® technology and Black Hard Coating

Sapphire crystal glass, anti-reflective on both sides

Screw-fastened doubly sealed crown

Water-resistant according to DIN 8310

Pressure-resistant to 100 bar (=underwater depth of 1000m), certified by DNV GL

Resistant to low pressure at high altitudes

According to technical demands of diver’s norm DIN 8306

According to the European diving equipment norms EN205 and EN14143, certified by DNV GL

Functions:

Hours, minutes, sweep seconds with stop-seconds

Date display

Diver’s rotating bezel with luminous triangle

Sinn Technologies:

Black Hard Coating on a TEGIMENT® technology

Captive diver’s bezel

Temperature resistant technology, therefore functionally reliable at temperatures from – 45 °C up to + 80 °C

Measurements / Weight:

Case diameter: 44 mm

Watch thickness: 14.3 mm

Weight: 113 g

Width between strap lugs: 22 mm

Dial / Hands:

Matte grey dial

Indices coated with luminescent colour

Hour, minute and second hands coated with luminescent colour

Guarantee:

2 years

Strap:

Calf leather strap and Camo Zulu strap

TESTAF

TESTAF is an acronym for ‘Technischer Standard Fliegeruhren’ (technical standard for pilot watches), a list of requirements and the creation of a certification body for watches launched by the Department of Aerospace Technology at Aachen University of Applied Sciences together with Sinn Spezialuhren which is used in professional aviation operations.

The role of a watch as part of contemporary aviation is barely different from the role of the diving watch in diving when it comes to issues of safety. In both cases, diving computers or on-board instruments are the main means of measuring time. However, wristwatches are commonly used as backup devices which enable the execution of the flight or dive in accordance with prescribed procedure or emergency termination in the case of primary equipment failure. Despite these similarities, DIN 8306 does provide a standardisation of the term ‘diving watch’, but there is not yet a similar regulation of the term ‘pilot watch’. TESTAF is meant to close this loophole and set out all requirements a wristwatch should meet in modern aviation. TESTAF can be viewed or downloaded at http://www.sinn.de/en/TESTAF.htm

Sinn Technology

Ar -Dehumidifying Technology –enhanced freedom from fogging

Ar-Dehumidifying Technology solves a basic problem of mechanical watches: the aging of oils due to moisture in the air contained inside, or diffusing into, the watch. The movement is mounted in a nearly anhydrous atmosphere thanks to the three Ar-Dehumidifying Technology elements of drying capsule, EDR seals (Extreme Diffusion-Reducing) and protective gas filling. Aging processes and fogging of the crystal from sudden cold are prevented, and reliable functioning and accuracy are ensured.

A three-year warranty is offered on all watches featuring Ar-Dehumidifying Technology.

D3-System

In our D3-System watches, the push-piece pins and crown shafts are mounted directly in a fine-finished case aperture, creating a perfect seal to the case. The name D3 comes from "direkt doppel dichtend", the German words for "direct double sealing".

In conventional designs, the push-piece pin and crown shaft are mounted in the case hole inside a tube insert. The required tube seal not only represents an additional potential source of gas diffusion (see Ar-Dehumidifying Technology), but careless handling can also lead to loss of water resistance with this design. This is because the push-piece pin and the crown shaft can bend in the tube if exposed to lateral knocks, permitting moisture to penetrate. This is a risk which also exists in screw-fastened crowns and push-pieces when they are unscrewed to make an adjustment.

DIAPAL – lubrication free escapement

The objective of the Ar-Dehumidifying Technology is to prevent the oil from aging. The idea behind the DIAPAL Technology goes one step further. In this case we select special pairs of materials that work together without lubrication (!) and without causing friction, ensuring long-term accuracy of the movement and particularly of the Swiss lever escapement.

A five-year warranty is offered on all watches featuring DIAPAL Technology.

SINN Movement SZ01 – centre-mounted stopwatch minute hand

The SZ01 chronograph is based on the successful Valjoux 7750 and has been specially developed by SINN. The development work began back in 2003.

The main priority in undertaking the redesign was to make the chronograph functions significantly easier to read off. Which is why we attached so much importance to finding a first-class technical solution to mounting the stopwatch minute hand in the centre of the dial. This allows users to take accurate stop times even more quickly and simply. The clarity and distinct readability of this chronograph stem from the design of the well-known Lemania 5100 movement.

Our redesign enhances the readability in two ways: firstly, 60 minutes are now counted in one sweep of the hand instead of the usual 30 minutes, and secondly, the minute stop scale covers the entire diameter of the dial.

TEGIMENT – greatly increased scratch – resistance thanks to surface hardening

TEGIMENT Technology raises the hardness level of the base material, e.g. stainless steel, by a significant factor. The technology was first introduced in the 756 Duochronograph at the International Baselworld Watch and Jewellery Show in Basel in 2003, replacing the ice hardening technique for nickel-free watch cases first presented in 2002. Originally TEGIMENT Technology was only used on stainless steel cases. The term is now used to refer to all materials with a hardened surface.

TEGIMENT Technology provides highly effective protection against scratches. The method is not, however, based on the application of a coating. Instead it is the surface of the material itself which is hardened by means of a special process, thereby creating a protective layer ("tegimentum" in Latin). The surface of any watch hardened using TEGIMENT Technology has a significantly greater level of protection against scratches than that afforded by the hardness of the base material.

Black Hard Coating – high quality coating – only in combination with TEGIMENT

We only use hard coating (PVD coatings) with TEGIMENT surfaces. Because only in this combination is it possible for our PVD paint coats to achieve their required high quality.

The hardness profile of the TEGIMENT layer is continuous, i.e. the high hardness of the surface transitions very gradually to the basic hardness of the material itself. This makes it possible to apply a PVD coating without any risk of the otherwise familiar peeling effect from the body of the case.

Paint coatings applied using the PVD technique are exceptionally hard. They have a hardness level of up to 2,000 Vickers. The great and sudden difference in hardness between the hard coating and the base material results in disruption between the two when subjected to stress because the hard shell (PVD coating) is applied with no transition to a very soft core (case material). If a local force is applied, the base material yields and cannot provide sufficient support for the outer layer. This is called the "egg shell effect".

The hardness of the TEGIMENT surface, by contrast, supports the hard coating layer. This prevents the egg shell effect and dramatically reduces flaking of the paint coating.

Temperature Resistance Technology – functionally reliable at temperatures from – 45 °C up to + 80 °C

The long-term accuracy of a watch movement crucially depends on the lubrication of its moving parts – this is particularly true at extreme temperatures. We use the special oil developed by SINN to ensure reliable function under even the most extreme conditions. With its outstanding properties, it provides lubrication that is highly resistant to aging at temperatures between – 45 °C and + 80 °C.

Lubrication with SINN Special Oil is indispensable in SINN watches which are exposed to a very wide spectrum of temperatures. Lubrication alone, however, is not sufficient. Just as important as the oil are the tolerances of the parts in the movement. Because a rise in temperature not only lowers the viscosity of the oil, it also causes the dimensions of the components to change to greatly varying extents. SINN counteracts this negative effect by testing each individual watch in an environmental test chamber. In these quality control tests, each watch must withstand a range of extreme temperatures without problems.

Captive Bezel

Outer bezel with a special design to prevent it from being lost.

Bezels are conventionally attached to the body of the case using a snap-in mechanism. If knocked, the ring can, in the worst case, become detached and the set time lost. Many our watches are therefore fitted with a safety system which overcomes this design weakness.

The design is based on an elastic, unsealed loss-prevention ring located in the interior of the bezel. A number of screws in the side contract this ring until it bridges the gap between the bezel and the case. Only by removing the screws does the loss-prevention ring relax and retract from the gap, allowing the bezel to be removed from the case.

Source:
The information herein is obtained from SINN Spezialuhren GmbH & Co. KG and is correct at time of this publication. SINN Spezialuhren GmbH & Co. KG & The Hour Glass Ltd reserve the right to amend or replace the above without prior notice.

Instrument Watch - Model 240 St (Basel 2015)

Sinn U1-D (The Hour Glass Special Edition)

TESTAF

TESTAF

Sinn Technology

Contents

Sinn Club SEA