Engine Gauge Unit (Triple), AN5774-8 C-121 Here is an Exhaust Temperature

Here is an Exhaust Temperature Indicator

see illustration from the B-17G Erection and Maintenance Manual in the photos

FSSC number 88-I-2385-100

These cameras were designed to record results obtained in aerial and ground gunnery training and for producing visual records of aerial combat

Here is a pair of components to the Bendix P-1 Autopilot System as used in US Navy aircraft of the 1950's

Engine Gauge Unit (Triple), AN5774-8 C-121 Here is an Exhaust TemperatureThe WWII era Engine Gauge Unit (aka Triple Gauge), AN5774 8, displayed the performance of 3 engine parameters in one instrument: Oil Temperature, Oil Pressure, and Fuel Pressure. The AN5774 8 unit was used in the US Army Air Force fighters P 38E Lightning, P 40 Warhawk, P 47 Thunderbolt, and P 51 Mustang according to their Maintenance Interchangeability Chart dated Feb 1945, as well as having been used in other military aircraft post war. This