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 manufacturer ThyssenKrupp Marine Systems: the steel manufacturers 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.
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 water-resistance and pressure resistance of 100 bar (= 1000 m water depth) was certified for the diving watch U1 by DNV GL. The safety test pressure used for this purpose was 125 bar.
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The Dual Strap System for use with Apple Watch
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alligator leather; black
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alligator leather; mocha-colored
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alligator leather; cognac-colored
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calfskin; black
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calfskin; black, contrasting seam ivory
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horsehide; brown, contrasting seam white
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cowhide with alligator embossing; black
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cowhide with alligator embossing; black, contrasting seam white
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cowhide with alligator embossing; mocha-colored, contrasting seam white
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cowhide with alligator embossing; marine blue, contrasting seam white
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cowhide with alligator embossing; cognac-colored, contrasting seam white
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cowhide; black, contrasting seam white
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cowhide; integrated in the case; black, contrasting seam white
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cowhide; integrated in the case; black, contrasting seam orange
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cowhide in Vintage-Style; dark brown, contrasting seam white
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cowhide in Vintage-Style; brown, decorative seam black
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cowhide in Vintage-Style; black, decorative seam red
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cowhide; blue, seam blue
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Canvas leather, grey
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Canvas leather, sand-coloured
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Alcantara; grey, seamless
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Black silicone strap integrated in the case; small folding clasp
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Red silicone strap integrated in the case; small folding clasp
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Green silicone strap integrated in the case; small folding clasp
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White silicone strap integrated in the case; small folding clasp
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Blue silicone strap integrated in the case; small folding clasp
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Red silicone strap integrated in the case; folding clasp with strap-length quick adjustment
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Green silicone strap integrated in the case; folding clasp with strap-length quick adjustment
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Blue silicone strap integrated in the case; folding clasp with strap-length quick adjustment
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White silicone strap integrated in the case; folding clasp with strap-length quick adjustment
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Black silicone strap integrated in the case; folding clasp with strap-length quick adjustment
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Red silicone strap with DuoFlex diving strap system; folding clasp with strap-length quick adjustment
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Green silicone strap with DuoFlex diving strap system; folding clasp with strap-length quick adjustment
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Blue silicone strap with DuoFlex diving strap system; folding clasp with strap-length quick adjustment
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White silicone strap with DuoFlex diving strap system; folding clasp with strap-length quick adjustment
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Black silicone strap with DuoFlex diving strap system; folding clasp with strap-length quick adjustment
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