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Sinn U50 SDR

Sinn U50 SDR

Model: 1050.04

The Sinn U50 SDR Men’s Automatic Premium watch. Featuring a 41mm Stainless Steel case, impressive Black dial, 50 ATM / 500m water resistance, and outstanding precision, this timepiece showcases the premium design and quality that independent German watchmaker Sinn is renowned for.


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Add an additional special discounted Sinn standard leather band to your new Sinn watch purchase.Click here to view all Sinn Bands & Clasps

For purchases on a leather, silicone or textile band: if you want a specific style or colour, please specify your band and colour choice below.

NB: All watches are delivered on standard ‘Medium-sized’ bands (suitable for approx.170-200mm wrist sizes). If you require a shorter or longer band please let us know. If you are not sure, simply let us know your wrist circumference and we will make sure you get the correct length.

Benefits and prices include:

Information & Media

Sinn U50 SDR


Sinn U50 SDR
Model: 1050.040

Sinn’s smaller diving watch with black bezel

The U50 delivers Sinn’s renowned durability and legibility in a 41 mm case diameter, designed for slimmer wrist sizes.

Visually, Sinn’s diver’s watches are recognised by their clear designs, matt black dials and displays that concentrate on the essentials. When it comes to features, the focus consistently returns to typical SINN characteristics.

Both case and crown are made of high-strength, seawater-resistant, German Submarine steel. This type of steel is known for its extremely high strength and exceptional non-magnetic properties, as well as its excellent resilience in seawater.

As with all Sinn diving watches, the rotating bezel is captive within the case to withstand accidental tampering. Because bezels are notoriously subject to exposure and can experience high levels of stress during use, Sinn has taken the additional step to harden the bezel surface using its TEGIMENT Technology. The result provides a robust, scratch-resistant, edge to give added protection for the case.

These features ensure the U50 is perfectly suited to diving use – a fact that has been verified by the classification company DNV GL (international registrar and classification society for professional diving equipment). DNV GL 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.

The addition of a black hardened, tegimented bezel unifies the design as well as adds increased durability to this susceptible section of the watch.

Technical Data
Mechanical Movement

Self-winding mechanism
25 bearing jewels
28,800 semi-oscillations per hour
Seconds stop function
Anti-magnetic as per DIN 8309


Case made of German Submarine Steel, bead-blasted
Sapphire crystal glass in front, anti-reflective on both sides
Case back screw-fastened
Crown screwable
Meet the technical requirements for waterproofness, as set out in standard DIN 8310
Pressure-resistant up to 500 m diving depth (= 50 bar), certified by DNV GL
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 GL
Low pressure resistant


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: 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


2 years

Manufactory visit and tour


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