Browse Items (2 total)
- Format is exactly "circular slide rules"
Mercury flash calculator
Mercury flash calculator (circular slide rule) made by the Universal Camera Corporation, circa 1940s-1950s.
[Flight computer]
![[Flight computer]](https://digitalcollections.museumofflight.org/files/square_thumbnails/b5df4d5d30410cfa1453229ddc5c0d66.jpg "[Flight computer]")
Flight computer (circular slide rule) made by the Perry Graf Corp., circa 1942.