Sinn - U2 SDR

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

• 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 waterproofness, as set out in standard DIN 8310
• Waterproof 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

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

• Case diameter: 44 mm
• Band lug width: 22 mm
• Case thickness: 15.5 mm
• Weight without strap: 114 gramme