Yes, two winners. It is a German Zeilflugpeilrahmen PR16. Commonly called a D/F loop in English and fitted to many Luftwaffe aircraft from about 1943 onwards. This unit is from a Bf 109 G-10, and it is in good condition except the steel loop that had corroded. However, they are quite fragile and I have not seen that many apart from those on surviving aircraft. The system worked with the FuG 16 ZY radio unit, and possibly another radio box and the AFN 2 indicator. I am not an expert in these electronics but I will try and say a little. Often, "D/F" loop aerials have a many-coiled circular loop that can be rotated on a mount. This can be rotated to get the best return from a beacon or transmitter and the relative angle measured. However, the PR16 is obviously fixed and I believe the aircraft had to physically fly headings to get the alignment with transmitters. The ground control (and aircraft) could only work a few frequencies and that limited the number of aircraft that could be controlled, or "worked". Late in the war, the system was changed with the additional underwing aerial on the long wooden blade, but I have not refreshed how that integrated with the system.
Cheers
Eng