Sinn
Sinn

U1

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U1

2000

Flagship U-boat steel diver's watch made from submarine steel, resistant to seawater corrosion.

Category
Dive
Designers
In-house design studio
Case materials
U-boat steel (submarine steel), Tegimented steel
Sizes
44mm
Dial
Matte black
Crystal
Sapphire
Strap / bracelet
Steel bracelet, rubber, silicone
Movements
SW200-1 (Sellita)
Movement type
Automatic
Power reserve
38 hours
Water resistance
1000m
Complications
Date
Key references
U1 SDR, U1 S
Price band
$2,200–$3,200
The house

Sinn

German tool-watch maker renowned for proprietary technologies like Tegiment hardening, dehumidifying capsules, and diesel oil case cushioning developed for pilots and divers.

Founded
1961
Founder
Helmut Sinn
Headquarters
Frankfurt am Main, Germany
Signature materials
Tegimented steel, submarine steel, German silver
Signature movements
SW300-1 (Sellita), Valjoux/ETA 7750-based chronographs
Notable designers
In-house design studio
Other Sinn collections