Direction Finding DF Indicator of R.1155 Nav-Com System TBM Avenger 1 Senior Navigator Embroidered Aircrew

1 Senior Navigator Embroidered Aircrew Insignia

so the glass is slightly loose

This is a Japanese Voltmeter

as used in early aircraft of the US Army Air Corps

the pointer rotates clockwise indicating altitude along the outer perimeter scale

Direction Finding DF Indicator of R.1155 Nav-Com System TBM Avenger 1 Senior Navigator Embroidered AircrewHere is a WWII era Direction Finding (DF) Indicator as used in aircraft of the British Royal Air Force, such as bombers Avro Lancaster, Handley Page Halifax, and Vickers Wellington, and patrol bomber Short Sunderland. The DF Indicator received its signal from the R. 1155 receiver in the radio (wireless) comparment. By seeking a signal from a ground transmitter, the indicator displayed the direction of the transmitter in relation to the aircraft by