The "block 55M" clock is designed for measuring the current time in hours and minutes and switching circuits in accordance with a specified time program in aviation technology. The clock was installed on one of the blocks of the identification system "6201" (IFF) and was intended for automatic switching of identification codes of jet aircraft of the radar interrogator-responder.They have built-in power switches and, unlike regular watches, a 24-hour dial to avoid double-starting the day. The scales and hands are covered with phosphor time! An action (for radioactivity does not matter) that has the effect of a residual glow in the dark after exposure to ordinary light, or a bright glow in the dark when ultraviolet irradiation of ARUFOSH valves used to illuminate aircraft cabin instruments. Use the red arrow to set the contact group response time. Thus, it is automatically triggered at 24: 00. The "6201" system was used on all air defense aircraft and helicopters of the USSR (Russia). The device is manufactured at the Chelyabinsk watch factory. The watch is in good working condition and keeps the correct time.
Duration of operation after full winding of the spring 2 days. Mechanism "Lightning" caliber 66970, 15 stones. Operating temperature range + 65°C, 60°C. Overall dimensions 114, 5x95x92 mm. The item matches the photo.
Production date: Made in the USSR (1991). The item "Vintage Soviet Cockpit Clock, Air Force Aircraft Aviation watch block 55M" is in sale since Saturday, November 14, 2020. This item is in the category "Collectibles\Militaria\Militaria (Date Unknown)\Air Force".The seller is "stat-ofis3" and is located in Kolomna. This item can be shipped worldwide.