The diving watch made of German Submarine Steel

Text: Press
Photo: Sinn Spezialuhren GmbH

Durability and clear readability in a 41 mm diameter size that is comfortable to wear: you will find these properties in the U50 series

Visually, the diver’s watch is noticeable for the striking design of its matte-black dial and a display that concentrates on the essentials. The case and crown are thus made of high-strength seawater resistant German Submarine Steel.

Case and crown are made of high-strength, seawater-resistant German Submarine Steel

This type of steel stands out not only for its extremely high strength and exceptional non-magnetic properties but also for its especially high resistance to seawater. The rotating bezel is designed so that it is captive in the case. As it may experience high levels of stress during use, the surface is hardened using TEGIMENT Technology, making it especially scratch-resistant.

Bezel made with TEGIMENT Technology and therefore especially scratch-resistant

These features make it clear that the U50 is perfectly suited to diving use – a fact that has been verified by the classification company DNV GL. DNV GL verifies and certifies pressure resistance to a diving depth of 500 metres (= 50 bar) and temperature resistance and functionality in accordance with the European diving equipment standards.

Tested based on European diving equipment standards and certified by DNV GL
SINN U50 vs U1 K
Crown is at 4 o’clock to prevent pressure on the back of the hand, pressure-resistant up to 500 m diving depth (= 50 bar), certified by DNV GL

Sinn U50 Automatik

Mechanical Movement • SW300-1 • Self-winding mechanism • 25 bearing jewels • 28,800 semi-oscillations per hour • Seconds stop function • Anti-magnetic as per DIN 8309


Case made of German Submarine Steel, bead-blasted • Sapphire crystal glass in front, anti-reflective on both sides • Case back screw-fastened • Crown screwable • Meet the technical requirements for waterproofness, as set out in standard DIN 8310 • Pressure-resistant up to 500 m diving depth (= 50 bar), certified by DNV GL • According to the technical demands for the diving norm DIN 8306 • Tested based on European diving equipment standards EN 250 / EN14143 and certified by DNV GL • Low pressure resistant


Hours, minutes, seconds • Date display • Diver’s bezel with minute ratcheting and luminous key mark SINN Technologies • Bezel with TEGIMENT Technology, therefore especially scratch-resistant

Captive bezel Dimensions and Weight

Case diameter: 41 mm • Band lug width: 20 mm • Case thickness: 11.15 mm • Weight without strap: 74 gramme

Dial and Hands

Matte black dial • Indices coated with luminescent colour • Hour, minute and second hand coated with luminescent colour

Warranty • 2 years

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