T-37B Tweet Jet Trainer Flight Computer 1968
Here is a Flight Computer for the US Air Force Cessna T-37B Jet Trainer made in 1968. It is a combination computer.
The first is the Constant Altitude Cruise Computer, designed for simple solution of level flight cruise control problems. It is a 3-disc circular slide rule.
On the reverse side is Take-off and Landing Computer. It is a 2-disc circular calculator.
Measures 6 inches diameter and is in exceptional condition given its age.