Sinn U2 dive watch

This is an awesome German dive watch from Sinn(the S is pronounced as a Z). Sinn is a German company. It was founded by Helmut Sinn in 1961, a World War 2 pilot and watch enthusit.


Sinn has quite the following of loyal fans and enthusiasts alike. I personally think the Sinn U2 is their best diver. I am trying to do a hands on review so be sure to check back here for that. I love the dial layout for his watch. What I also love about this watch is how rugged it is. It’s made from the same steel that used in submarines, highly resistive to salt water corrosion. Check out the technical data below. Forget the Rolex James Bond, this is the watch you should be wearing.(check out this link for more on that:

Thanks to Kleiter Sabine from Sinn Watches for sending me the pictures and information. Sinn may be a small company but they make awesome, high quality watches and have sone of the best customer service out there!

Information and pictures supplied directly from Sinn Watches.

Completely made of high-strength seawater-resistant German submarine steel
Tested based on European diving equipment standards and certified by DNV GL
Black Hard Coating on a TEGIMENT Technology basis
Ar-Dehumidifying Technology enhances functional reliability and freedom from fogging
Functionally reliable from –45 °C up to +80°C
Captive diver’s bezel with minute ratcheting
Crown at 4 o’clock to prevent pressure on the back of the hand
Second time zone on a 24-hour basis
Mission timer design for optimal readability
Sapphire crystal glass
Pressure-resistant to 2,000 m diving depth (200 bar), certified by DNV GL
Low pressure resistant


The diving watch U2 is a professional mission timer which uses genuine German submarine steel, a material with extreme seawater-resistance and the highest level of non-magnetic properties. Sinn’s special oil and an adjusted position tolerance of the parts in the diving watch U2 series guarantee operation at temperatures ranging from minus 45 °C to plus 80 °C.
And that’s not all: with the diver’s bezel, this diving watch is well-equipped to measure the duration of a dive accurately. Fogging of the dial poses a safety risk when diving. To prevent this, we use EDR seals. This material, with its extreme chemical resistance and only a quarter of the gas permeability of conventional seals, prevents moisture from diffusing into the diving watch. The slightly domed, 4.2 mm thick scratch-resistance anti-reflective sapphire crystal glass withstands even the highest pressures. The case is filled with a protective gas, while three drying capsules keep the interior dry.

Mechanical Movement
ETA 2893-2
Self-winding mechanism
21 bearing jewels
28,800 semi-oscillations per hour
Seconds stop function
Shock resistant as per DIN 8308
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
Water-resistant as per DIN 8310
Pressure-resistant up to 2,000 m diving depth (= 200 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
Second time zone on a 24-hour basis
Date display
Pilot’s bezel with minute ratcheting and luminous key mark
SINN Technologies
Bezel with TEGIMENT Technology, therefore especially scratch-resistant
Captive bezel
Ar-Dehumidifying Technology enhances functional reliability and
freedom from fogging
Temperature resistance technology, therefore functionally reliable at temperatures from -45°C up to +80°C
Dimensions and Weight
Case diameter: 44 mm
Band lug width: 22 mm
Case thickness: 15.5 mm
Weight without strap: 114 gramme
Dial and Hands
Matte black dial
Indices coated with luminescent colour
Hour, minute and second hand coated with luminescent colour

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