This watch doesn't need any power source!! Old Soviet aviation clock of the USSR air force " clock block 55M ". The "block 55M" clock is designed to measure the current time in hours and minutes and to switch circuits in accordance with a given 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 clocks, a 24-hour dial to avoid a double start to 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 normal 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 response time of the contact group. Thus, it is automatically triggered at 24: 00. The "6201" System was used on all air defense planes and helicopters of the USSR (Russia). The device is manufactured at the Chelyabinsk watch factory. The details are as follows.
The watch is in good working condition. Thank you very much for your interest in my product!
I will answer all your questions. Please let me know so we can talk and resolve this issue together.Please check my other products in my store. Duration of operation after complete winding of the spring 2 days. The mechanism of "lightning" caliber 66970, 15 jewels. Operating temperature range + 65°C, 60°C. Overall dimensions 114, 5x95x92 mm. This item matches the photo. Date of production: Made in the USSR (1991). This watch has a light mass of temporary cumulative action. After turning off the light, the dial and hands will glow in the dark for a while. The watch is in excellent working condition. The external state corresponds to the photo. There are a few small scratches on the glass. The item "Vintage Soviet Cockpit Clock, Air Force Aircraft Aviation watch block 55M" is in sale since Wednesday, June 3, 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.