Compass, Type 1, Japanese Army Aircraft, Tokyo Aero Indicator Co. P-39 See photo of the location

See photo of the location of the instrument on the air conditioning control panel from the C-121 flight manual dated 1965

the other marked for engines 3 & 4

This is a 1950s-vintage aircraft Fuel Quantity Indicator

made by Kollsman

Compass, Type 1, Japanese Army Aircraft, Tokyo Aero Indicator Co. P-39 See photo of the locationThis magnetic compass, made by Tokyo Aero Indicator Co. was primarily used in early aircraft of the Japanese Army (Type 91 Fighter, Type 95 Model 3 Trainer, Type 97 Heavy Bomber, Type 98 Direct Co operation aircraft, Type 99 Trainer, and Type 100 Transport) but also used in the Type 97 Mitsubishi Ki 21 Sally Bomber.