Aircraft Clock, 8-Day, AN-5743-T-1A Korean War all of which make the

all of which make the long and tedious survey flights more endurable

which when turned rotates the red pointer and the corresponding mach number

Large (Battle) Cruiser Alaska

allowing the pilot to turn the aircraft in the correct direction

as well as the mileage flown

Aircraft Clock, 8-Day, AN-5743-T-1A Korean War all of which make theThis is a Cold War era 8 Day Aircraft Clock AN 5743 T 1A made for aircraft manufactured by Douglas Aircraft Corporation, as evidenced by the order number prefix "DA". The serial number prefix of "51" is indicative of a manufacturing order dated 1951. May have been used in the Douglas Skyraider attack aircraft. The adjustment winding knob pulls out and adjusts the time, however, the clock only runs for several seconds. It likely needs servicing by a