Sinn Spezialuhren GmbH ●

Im Füldchen 5 – 7 ●

60489 Frankfurt am Main ●

+49 (0)69-978414-200

• Case made of high-strength seawater-resistant German submarine steel
• Bezel with Black Hard Coating on a TEGIMENT Technology basis
• Tested and based on European diving equipment standards and certified by Germanischer Lloyd, Hamburg
• Captive diver's bezel with minute ratcheting
• Crown at 4 o'clock to prevent pressure on the back of the hand
• Sapphire crystal glass
• Pressure resistant to 1,000 m diving depth (100 bar), certified by Germanischer Lloyd Hamburg
• Low pressure resistant

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With the diving watch U1, Sinn engineers succeeded in developing a diving watch in which the quality of material and design gives it superior resistance to external influences under extreme conditions of use. In their search for a steel with the desired resistance, the Sinn engineers found what they were looking for at the German submarine yards Howaldtswerke-Deutsche Werft GmbH and Nordseewerke GmbH: the steel manufacturers for these shipyards supply small quantities of the original steel of the current German submarine production exclusively to Sinn for making diving watches — the very steel of which the external hulls of the German Navy's new submarine class 212, which currently represents the most advanced non-nuclear submarines in the world, are made.

This original submarine steel is not only extraordinarily seawater-resistant but is also of the highest non-magnetic quality without any residual magnetism. Another advantage of this steel is its outstanding ability to be combined with the TEGIMENT Technology. Thus the rotating bezel of the diving watch U1 is surface-hardened as standard to 1500 Vickers. Likewise, the anti-reflective coat of the flat sapphire crystal glass has an extreme hardness of 1800 HV. To ensure reliably that the rotating bezel of the diving watch does not detach under harsh impacts, it is attached as a captive bezel to the central part of the case. The ratcheting is mounted on a sophisticated bearing system. Slightly radially offset locking pin positions protect the toothed ring, ensure reliable function over the long term and facilitate firm and secure ratcheting with a rich clicking sound.

The water-resistance and pressure resistance of 100 bar (= 1000 m water depth) was certified for the diving watch U1 by Germanischer Lloyd, Hamburg. The safety test pressure used for this purpose was 125 bar.

• Mechanical Movement
• • ETA 2824-2
  • Self-winding mechanism
  • 25 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 German submarine steel, bead-blasted
  • Sapphire crystal glass in front, anti-reflective on both sides
  • Case back screw-fastened
  • Crown screwable
  • Water-resistant as per DIN 8310
  • Pressure resistant up to 1,000 m diving depth (= 100 bar), certified by
  • Germanischer Lloyd Hamburg
  • According to the technical demands for the diving norm DIN 8306
  • Tested based on European diving equipment standards EN 250 / EN14143 and certified by Germanischer Lloyd Hamburg
  • Low pressure resistant

• Functions
• • Hours, minutes, seconds
  • Date display
  • Diver’s bezel with minute ratcheting and luminous key mark

• SINN Technologies
• • Bezel with Black Hard Coating on a TEGIMENT Technology basis
  • Captive bezel

• Dimensions and Weight
• • Case diameter: 44 mm
  • Band lug width: 22 mm
  • Case thickness: 14.3 mm
  • Weight without strap: 113 gramme

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

• Warranty
• • 2 years