Single button chronograph wristwatch manufactured by the Societe Hanhart of Schwenningen-am-Nackar. Dial marked with the “Hanhart” logo along with the “KM” logo (Kriegsmarine contract abbreviation). Case in heavy nickle-silver plate over brass. Rotating ‘multi-tooth’ stamped bezel ring has red paint pointer. Matt black dial has constant seconds subsidiary dial along with elapsed 30 minutes dial. Dial outer edge also bearing seconds time scale along with inner telemeter indicator. Watch case has screw on back plate manufactured of high grade polished steel.
Outside of back plate bears machine impressed eagle and swastika with “M” (Marine designation) then the contract serial number for the Kriegsmarine and finally the wording “BODEN EDELSTAHL” (polished high grade steel), the inside of the backplate is free from any designation. Watch has a 15 Ligne chronograph movement, 17 jewels, mono-metallic screw balance, self compensating Breguet hairspring, silvered plates and bridges, copper wheels. The watch/movement number (113448) is stamped to the holding plate for the minute counter and centre chronograph wheel cock. The movement has a “shock-resist” system incorporated.