Sinn (Germany) U50 S – Ref. 1050.020 – The Black Diving Watch Made of German Submarine Steel On Silicone Strap



1 in stock

Localtime Ltd (Cyprus) is an Authorised Distributor for Sinn Spezialuhren (Germany). Contact us for any models you do not see listed here.

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. When it comes to its features, we also focus consistently on typical SINN characteristics. The case and crown are thus made of high-strength seawater-resistant German Submarine Steel with Black Hard Coating on a tegimented basis. 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. We have designed the rotating bezel so that it is captive in the case. As it may experience high levels of stress during use, we have also hardened the surface using TEGIMENT Technology, making it especially scratch-resistant. These features make it clear that the U50 S is perfectly suited to diving use – a fact that has been verified by the classification company DNV. DNV 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. Listed price includes the red silicone strap with black butterfly clasp as in the main photo. Other photos showing the watch on other strap types are for presentation only. If you prefer a different type of strap, feel free to contact us for availability.”



  • Sellita Cal. SW 300-1
  • Self-winding mechanism (automatic)
  • 25 bearing jewels
  • 28,800 semi-oscillations per hour
  • Stop-seconds function
  • Anti-magnetic as per DIN 8309


  • Case made of German Submarine steel
  • Sapphire crystal glass in front, anti-reflective on both sides
  • Transparent case back made of sapphire crystal glass, anti-reflective on the interior
  • Screw-fastened case back
  • Screw-down crown
  • Meets the technical requirements for waterproofness, as set out in standard DIN 8310
  • Waterproof and pressure-resistant to 500m diving depth (= 50 bar), certified by DNV, 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
  • Low pressure resistant


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

Sinn Technologies:

  • Captive bezel
  • Black Hard Coating on a TEGIMENT Technology basis

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

Straps: We carry a large selection of Sinn replacement straps (with or without buckles), listed separately in our store.


Sinn (Germany)

Production Period

Brand New


U50 S – Ref. 1050.020


Time, Date, Rotating Bezel




25j Sellita Cal. SW 300-1

Case Material

Stainless Steel (Sinn Black Hard Coating Technology)

Case Back

Stainless Steel (Sinn Black Hard Coating Technology)

Case Size

41mm case, excluding the crown at 4h

Lug Width



Brand New – 2 Years Manufacturer's Warranty


FREE (Express & Fully Insured)