- Case made of stainless steel, polished
- Blue electroplated dial, UV resistant
- Ar-Dehumidifying Technology enhances functional reliability and freedom from fogging
- Functionally reliable from -45 °C up to +80°C
- Sapphire crystal glass
- Solid back (transparent back made of sapphire crystal optional)
- Pressure-resistant to 300 m diving depth (30 bar)
- Low pressure resistant
Shipping costs, taxes and customs duties
New watch deliveries are free of shipping costs within Germany. For delivery to European Union (EU) Member States, we charge EUR 80.00 and for deliveries to all other countries we charge EUR 120.00 shipping costs. For bracelets and accessories we charge EUR 6.50 within Germany, EUR 30.00 to European Union (EU) Member States and EUR 50.00 to all other countries.
Shipping costs for service and spare parts can be found in the service price list.
For deliveries within the European Union (EU), the VAT rate of the supplier country is charged. Deliveries outside the EU are shipped VAT-free.
For deliveries outside the EU, additional customs duties and fees may apply. Please check the relevant customs regulations with the respective customs authorities.
The 203 ARKTIS chronograph is our 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 – with flying colours! The 203 ARKTIS survived not only all the dives in the icy water of the Arctic Ocean, also sessions in the sauna on-board 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.
![](https://www.sinn.de/out/pictures/generated/product/11/640_360_100/sinn_203_arktis_k.jpg)
Technical details
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
The information on the mechanical movement corresponds to the current production situation in Frankfurt am Main. Due to technical changes, it may happen in individual cases that stock items of our sales partners deviate from this information.
Sapphire crystal glass in front, anti-reflective on both sides
Case back screw-fastened
Crown screwable
Push-pieces screwable
Meet the technical requirements for waterproofness, as set out in standard DIN 8310
Pressure-resistant up to 30 bar (= 300 m water depth), 20 bar with transparent case back
Low pressure resistant
Date display
Day of the week display
Chronograph
Diver’s bezel with minute ratcheting and luminous key mark
Temperature resistance technology, therefore functionally reliable at temperatures from -45 °C up to +80°C
Band lug width: 20 mm
Case thickness: 16 mm
Weight without strap: 90 gramme
Indices coated with luminescent colour
Hour, minute and second hand coated with luminescent colour