Temperature Indicator, Electrical, 160deg C, Luftwaffe Fl.20358 FW190 PBM-5 Mariner It has a manufacturing date

It has a manufacturing date of Oct 1941

part number 739U-03

indicating manufacturing year of 1944

The crown symbol of the Air Ministry is imprinted on its rear case with its stores reference number

Temperature Indicator, Electrical, 160deg C, Luftwaffe Fl.20358 FW190 PBM-5 Mariner It has a manufacturing dateHere 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