Engine Gauge Unit (Triple), AN5774-8 C-121 Here is a pair of

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

The Special Devices Section grew and became the Special Devices Division

Here is an Exhaust Temperature Indicator

tracked armored landing vehicles

or Machmeter

Engine Gauge Unit (Triple), AN5774-8 C-121 Here is a pair ofThe 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