The German 7.5cm Pak40 was after 1942 the main anti-tank weapon of the German "Panzerjäger" (tank hunter) and was effective in anti-tank battle at the eastern front until the appearance of the heavy russian IS tanks and effective at the western front until end of the war.
More than 23000 were produced between 1941 and 1945.
Diorama of 1:72 German PAK 40 of WW2