Temperature Indicator, Electrical, 160deg C, Luftwaffe Fl.20358 FW190 PBM-5 Mariner The crown symbol of the

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

part number 739U-03

Here is an aerial refueling nozzle

It has a manufacturing date of Oct 1941

and has a serial number prefix of AF44

Temperature Indicator, Electrical, 160deg C, Luftwaffe Fl.20358 FW190 PBM-5 Mariner The crown symbol of theHere 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