HANHART. A VERY RARE MEN'S BRASS GERMAN MONO PUSHER CHRONOGRAPH KM (KRIEGSMARINE) AND SINGED OPENING TOOL WWII Model: Monopusher Kriegsmarine Date: Circa 1940's Movement: Manual, mono pusher, 17-Jewels, screw balance, Breguet spring, Incabloc shock proof, d=40mm,  Cal. 40, No. 109'103 Dial: Signed, black, Arabic applied luminous numerals, white "KM" at the 12 o'clock position, red outer telemeter division, white outer seconds division, subsidiary dial for seconds at the 9 o'clock division, subsidiary dial for 30 min chronograph at the 3 o'clock position, silvered Mercedes hands with luminous insert, white centre seconds hand  Case: Signed, brass brushed, bi-directional bezel, stainless steel screw down back Eagle M No. 093 Strap: Generic brown strap Size: 39mm Accompaniments: Signed military German opening tool, Eagle M "Hanhart" No. 428B  Military watch for the German Navy, developed in the 40's with one pushed and telemeter scaling for U-Boat captains. The production was discontinued due to a preference for pocket watches. The "Hanhart KM" became a very rare piece for collectors, difficult to find due to the already low production and the conspicuous disappearance during the war times. Our model with the signed opening tool is even rarer and appears at auction for the first time. *The same watch can be found in the publication Military Timepieces by Konrad Knirim, pp. 262, 263.