Temperature Indicator, Electrical, 160deg C, Luftwaffe Fl.20358 FW190 Curtiss and then the opened window

and then the opened window would be affixed to the internal cockpit ceiling with the snap-fit strap

and Moore part number 6548-73-15 was used in fighters P-38 Lightning

and received signals from the bombardier to indicate his desired course changes

It is about 3/4 inch thick

The observer held the indicator about two feet from his eye

Temperature Indicator, Electrical, 160deg C, Luftwaffe Fl.20358 FW190 Curtiss and then the opened windowHere is a WWII era electrical Temperature Indicator used in aircraft of the German Luftwaffe, measuring temperature from 10 deg C to 160 deg C. Likely used to measure cylinder head or oil temperature, the flexibility facilitated by the adjustable limit pointers. It is labeled Fl. 20358, and was made by Hartmann & Braun. According to references on the internet, this instrument appeared in Luftwaffe aircraft Focke Wulf 190 D 9, FW Ta 152, Dornier Do