Oil Temperature Indicator, Dual Engine, Type A-24 US Army Air Corps WWII Dinah Reconaissance The knob turns easily and

The knob turns easily and rotates the pressure scale as it should

This is an original 3-box-set collection of pages for Recognition Manuals published by the US Navy's Office of Naval Intelligence in 1942-43

Measures 12 in x 6

and US Air Force

Researching the internet reveals that Type ASD X-band airborne search radar used this indicator as a B-scope (range vs bearing) in US Navy patrol aircraft to detect ships and surfaced submarines

Oil Temperature Indicator, Dual Engine, Type A-24 US Army Air Corps WWII Dinah Reconaissance The knob turns easily andThe Army Type A 24 Dual Engine Oil Temperature Indicator was used across a number of US Army Air Corps 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 A 24 was made by Sutton Horsley, part number 2213 7, and has a serial number prefix of AF42, indicative of a 1942 manufacturing date. This