USAAF Type C-2 Computer
By G Felsenthal & Sons, Chicago. Computer, Altitude Correction Type C-2. 20cm diameter white plastic disc type computer for calculating altitude according to the atmospheric pressure. Essentially this is the same as the later AN-5837. That having luminous marking for use in the dark. This example is in very good used condition and has a 1942 order code. Stock code M20165.