The 203 ARKTIS Chronograph is Sinn’s first diving watch to feature Temperature Resistance Technology. This means that it is guaranteed to run and function reliably even at exceptionally low temperatures. This watch passed its Arctic endurance test on the wrist of extreme diver Mario M. Weidner. The 203 ARKTIS survived not only all the dives in the icy water of the Arctic Ocean, also sessions in the sauna onboard of the research vessel. However, the true test of the watch's quality lay in coping with the extreme temperature fluctuations between those found in the water (freezing point) and those on land (up to –25 °C) which represents a real challenge for a watch worn outside a thermal diving suit. Each individual piece the diving watch 203 ARKTIS undergoes function testing by Sinn at a temperature range between –45°C and +80°C, which is very unusual for mechanical watches.
Valjoux 7750 Self-winding mechanism
25 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 stainless steel, polished Sapphire crystal glass in front, anti-reflective on both sides
Case back screw-fastened
Water-resistant as per DIN 8310
Pressure-resistant up to 30 bar (= 300 m water depth), 20 bar with transparent case back
Low pressure resistant
Hours, minutes, subsidiary seconds
Day of the week display
Diver’s bezel with minute ratcheting and luminous key mark
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: 41 mm
Band lug width: 20 mm
Case thickness: 16 mm
Weight without strap: 90 gramme
Dial and Hands
Blue electroplated dial
Indices coated with luminescent colour
Hour, minute and second hand coated with luminescent colour
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