Movement: Caliber 3133, hand-wound (23 ruby ​​stones). Balance: Frequency of 21,600 vibrations per hour, ensuring maximum precision. Functions: Chronograph (stopwatch with a date display. Power reserve of at least 43 hours. Feature: A thorough Soviet modernization of the Swiss ETA Valjoux 7734 movement. Soviet engineers added a shock-absorbing device and increased the speed.