Glass: SapphireCase: Mirror polished case, case back and buckle, mirror polished crown, control buttons and bezelStrap: Genuine leatherStrap size: 22 mmCase size: 46 mmWR: 50 mLimited edition: NoThe special AChS-1 watch is a legend of Russian aviation.
Functions: hours, minutes, small second, central stopwatch, 30 minutes counter, 12 hours counter. Movement: Swiss quartz movement Ronda 3520. Its reputation is built on many years of smooth operation without any issues in both peaceful skies and in real military operations.0 STEEL For decades, these timepieces have been installed in almost every kind of Russian aircraft and helicopter, including the following: Tu-95MS, Tu-22M3, Tu-160, Il-76, Su-24, Mi-171, Mi-8, Ansat, Mi-38, Mi-28, Ka-52.