Model 350503 The movement is a mechanical "Vostok 2416". The number of stones is 31. An instant calendar. 24 mm caliber movement with a central second hand. Self-winding with a safety device against over-winding of the spring. Frequency: 19800 half-vibrations/hour. Case: stainless steel (case, time dial, crown, back cover of the watch). The hour markers and hands are filled with fluorescent paint of variable action. Organic glass. Strap: genuine leather, 22 mm wide. Water protection: 10 atmospheres (100 meters). The energy reserve of one spring winding is at least 31 hours. Average daily running time: -20... +60 seconds per day. The average service life of the movement is 10 years. Weight: 86 g. Dimensions: 42x48.8x15 mm.