The item ampex 300 reel to reel tape machine, 2 track recorder, 375 power, fan & rack is in sale since Saturday, May 30, 2020. When I obtained this 1954 Ampex 300, I was told that this system had been in service as a flight recorder on a Boeing 1954 B-52 Stratofortress Long Range Bomber, which was owned and operated by the United States Air Force.