HYPERBAR® by Chronotime AG, Uster/Switzerland - Oil filled watch for an extreme water resistant up to 12000m! Hyperbar® Deep Diver System (special liquid filling) tested 1200 bar (12.000m - 39.600ft) - SVTI n° 114937 Swiss quartz movement ETA 955.612 ( .112 ) gold plated Case size 40mm without crown Complete set - box and papers The HYPERBAR® Deep Diver System is based on a simple physical principle which starfish and sea-urchins have known for millions of years: the incompressibility of liquid. These aborigines of the sea consist of a texture that is permeable to the water surrounding them. This means the external pressure will be equalized by the internal pressure, equivalent to a force zero, allowing for starfish and sea-urchins to survive in depths up to several thousand meters. The liquid filling does not affect the precision of your watch (± 10 sec. per month). The slightly higher resistance caused by the liquid is compensated by the regulating system of the movement. Tests in our laboratory have proven that the energy consumption is within the range of "empty" quartz watches. The insulating effect of the fluid prevents craw streams and the possibility of a short circuit. As a result, an increased consumption caused by the higher resistance is compensated. In addition, the HYPERBAR® Deep Diver System includes other salient advantages for the watch, such as: Excellent readability from all angles. As the light is not refracted by the crystal, interfering reflections don't appear. At the same time the fluid acts as a magnifier. Higher corrosion-resistance for all parts inside the watch case due to the oily liquid. Reduced wearing of the movement due to permanent lubrication. For more details, please take a closer look at the photos - pictures are part of the description! Gender: Men's Age Group: Adult Brand: SDW Swiss Diver Watches Movement: Mechanical automatic Case Size: 40mm Lug Width: 20mm Please check out my other vintage watches. Please understand: The vintage watches I offer are on average 50-60 years old. Please note that the measured accuracy of some old watches may in exceptional cases be affected by magnetism along the traffic route. Goods will be shipped by registered insured international mail. All photos of this is the actual item you will receive. The cushion is not part of the sale. Import duties, taxes and charge (outside EU) are not included in the item price or shipping cost - these charge are the buyers responsibility.