9/2/21 - This is a rare Luftwaffe Ku Luger magazine from WW2. The magazine is Haenel made and "fxo" code stamped on the tube along with two eagle/37 proof stamps. The black bakelite base is stamped with a serial number and plus sign. The base is excellent with no cracks or chips. The tube has some mild surface wear but no rust or pitting. Strong, functional spring.