Original WWII Made by Kadlec in Czechoslovakia and introduced as AK-39 (Armband-Kompass ''wrist compass'' 1939) to the Luftwaffe. The Luftwaffe register number is Fl23235-1 with Fl standing for Fliegermaterial i.e. aeronautical materiel. The diameter is 60 mm. The liquid inside is pure petroleum (kerosene) and can be exchanged or refilled during inspection. This model allowed the setting of a course by means of two white rotating semi-circular sheets located at the underside. Moreover, rifle-type sighting aids allowed the taking of a bearing (on the ground if downed). Red sighting aids date the compass to the late war period of 1943-1944. Offered in excellent original condition.