Original Luftwaffe airplane part. Ln27166. Umformer U25 current transformer for FuG25 Telefunken. Size appr. 14x9cm. Weight appr. 1.3kg. Used in many bombers and fighter planes of the Luftwaffe. The FuG 25 was a kind of radio signal operated radar device mounted in airplanes so the German Flak could determine if it was friend or enemy.