F9F-8 Panther Fighter Cruise Control / Rest / Climb-Descent Combination Computer 1956 F-94 and a spider-type compensator

and a spider-type compensator

The K-series sights were found in US Army Air Force bombers such as the B-17 Flying Fortress and B-24 Liberator

though slow

indicating altitude to 4

The bulb illuminated the reticle which was projected through the lens onto the glass reflector from below

F9F-8 Panther Fighter Cruise Control / Rest / Climb-Descent Combination Computer 1956 F-94 and a spider-type compensatorThis is a Korean War era Flight Computer designed specifically for the US Navy's jet fighter, the Grumman F9F 6 Panther, equipped with twin J 48 P 8 engines. It includes a Rest Computer (Rest meaning not flying under combat conditions) on one side and a Climb Decent Tabulator on the opposite side. these are essentially 2 disc, 7 inch circular slide rules.