Overview
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.
Special characteristics
- Completely made of high-strength seawater-resistant German Submarine Steel
- Tested based on European diving equipment standards and certified by DNV
- Bezel with 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
- Water-resistant and pressure-resistant to 2,000 m diving depth (= 200 bar), certified by DNV
- Low pressure resistant
Movement
SW 330-1
Self-winding mechanism
25 bearing jewels
28,800 semi-oscillations per hour
Seconds stop function
Anti-magnetic as per DIN 8309
Case
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 water-resistance, as set out in standard DIN 8310
Water-resistant and pressure-resistant to 2,000 m diving depth (= 200 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
Functions
Hours, minutes, seconds
Second time zone on a 24-hour basis
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
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
Mission timer design for optimal readability
Comes with original box, COA s/n 1020.2653, instructions, extra links and tool. Has some scuffs on the bracelet, has been worn, otherwise excellent condition.