Temperature Indicator, Dual Engine, Oil or Coolant, -70 to +150d C, AN5795-6 F-14 The lid contains a calculator

The lid contains a calculator for speed

these are essentially 2-disc

This is a nice example of the US Navy's Vertical Speed Indicator R-88-I-750 as used in the SB2C Helldiver Dive Bomber of WWII

and top of the P-80 aircraft

Temperature Indicator, Dual Engine, Oil or Coolant, -70 to +150d C, AN5795-6 F-14 The lid contains a calculatorThe 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 Edison, part number 33203, and has a serial number prefix of AF43, indicative of a 1943