Original German WWII Inert Maschinengewehr MG151/15 Cannon Round - Dated 1943 Antique Smith & Wessons So this example is likely

So this example is likely dated 1944

both correct for Johannes Grossfuss

Most likely a WWII bring back that has stayed in this remarkable collection ever since

leaving an oxidized patina

Original German WWII Inert Maschinengewehr MG151/15 Cannon Round - Dated 1943 Antique Smith & Wessons So this example is likelyOriginal Item. Only One Available. The Maschinengewehr (MG) 151 is a belt fed autocannon for aircraft use, developed in Germany from 1934 to 1940 and produced by Waffenfabrik Mauser during World War II. It was originally produced in 15. 1 mm caliber from 1940, with a 1596mm cartridge, but due to demand for higher effect against aircraft, especially with the introduction of mine shells for the 20 mm MG FF M aircraft cannon, the design was rechambered