Temperature Indicator, Dual Engine, Oil or Coolant, -70 to +150d C, AN5795-6 Battle Tachometers

Tachometers

clearly made for an Air Corps order

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Here is an original WWII-era 31-page booklet on the Fundamentals of Air Fighting

The interface design is identical to the Remote Compass Indicator AN5730-2A

Temperature Indicator, Dual Engine, Oil or Coolant, -70 to +150d C, AN5795-6 Battle TachometersThe Army Navy Type AN5795 6 Dual Engine Oil or Coolant Temperature Indicator was used across a number of US Army Air Corps, Navy, and Air Force aircraft during WWII, including heavy bombers B 17, B 24, B 29, medium bombers B 25 and B 26, as well as light bomber A 20, according to the Accessories Interchangeability Chart dated Feb 1945. This indicator was made by Electric Auto lite, part number 10499 A, and has a serial number prefix of AF44,