The Sinn U1 S PVD Bracelet 44mm (Ref. 1010.020) represents the diving watch made of German Submarine Steel with all-over Black Hard Coating on a TEGIMENT Technology basis, the proprietary hardening process that prevents the “eggshell effect” where conventional DLC coatings flake from softer base materials through abrupt hardness differences. The continuous hardness profile of TEGIMENT transitions gradually from surface to core, allowing the DLC coating to be supported rather than underlaid by soft material, dramatically reducing wear.

At 44mm with 14.7mm thickness through TEGIMENT-hardened German Submarine Steel construction, this provides substantial diving presence whilst the black hard coating creates uniform stealth aesthetic throughout. The German Submarine Steel itself carries the highest level of non-magnetic properties and extreme seawater resistance, whilst the captive diver’s bezel with minute ratcheting and luminous key mark is virtually impossible to detach from the case as a result of hard knocks.

The SW 200-1 delivers reliable performance through 26 bearing jewels operating at 28,800 semi-oscillations per hour with seconds stop function and anti-magnetic certification to DIN 8309. The crown positioned at 4 o’clock prevents pressure on the back of the hand during diving operations, a practical ergonomic consideration rarely found on conventional divers.

The 1,000m water and pressure resistance is certified by an independent institute to European diving equipment standards EN 250 and EN14143, with additional German diving norm DIN 8306 compliance. The sapphire crystal with anti-reflective coating on both sides ensures optimal clarity. German Submarine Steel, TEGIMENT-supported DLC, independent 1,000m certification, and a crown at 4 o’clock: the Sinn U1 S makes no compromises on professional diving specification.