U1Model 1010.010.rubber By Sinn
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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.
25 bearing jewels
28,800 semi-oscillations per hour
Seconds stop function
Shock resistant as per DIN 8308
Anti-magnetic as per DIN 8309
• 2 years
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