COOPER'S AVIATION FLIGHT COMPUTER.
A circular instrument used to compute air speed, mach number, and other parameters, 4½ inches in diameter. With stapled user's manual, signed by Gordon Cooper, and soft plastic case.
Accompanied by a Typed Letter Signed by Cooper on his stationery which reads: "This was my MB-2A Air Navigation Computer that I used extensively during my Air Force career in the late 1950s and while as an astronaut for NASA in the 1960s. It was actually in my flight jacket while the well known photograph of the Mercury Seven astronauts in front of the F-106 jet was taken. The computer, instruction book, and carrying case were used on many flights to the Mercury and Gemini spacecraft manufacturing plant in St. Louis and to the Cape for space flight preparations."