USSR Vintage Soviet Air Force Aircraft Clock Aviation "Hour block 55M". Clock "block 55M" is designed to measure the current time in hours and minutes and switching circuits in accordance with a predetermined time program in aeronautical engineering. Clocks were installed on one of the blocks identification system "6201" (IFF) and intended for automatic switching of identification codes Jets radar interrogator respondent. They have built-in power switches and, unlike normal hours, 24-hour dial, to avoid double triggering a day. Scales and hands are covered with phosphor time!
Actions (for radioactivity is irrelevant), which has the effect of residual glow in the dark after exposure ordinary light, or a bright glow in the dark under ultraviolet irradiation ARUFOSH valves, used for illumination of devices the airplane cabin. The red arrow is used to set the response time of the contact group. So it is automatically triggered at 24:00. The system "6201" stood on all airplanes and helicopters of Defense of the USSR (Russia). Most likely, and now stands.The device is produced by Chelyabinsk Watch Factory. The item "Soviet Cockpit Clock 55M Air Force Aircraft Aviation watch block 24 hour USSR" is in sale since Friday, April 16, 2021. This item is in the category "Collectibles\Militaria\Militaria (Date Unknown)\Air Force". The seller is "igorvintageseller" and is located in Ternopil. This item can be shipped worldwide.