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Sweden, British, USA, German and Japanese Bofors 40 mm/56 (1.57") Model 1936 |
 | | The first USN pilot twin was produced in January 1942 and the first quad in April 1942. |
| | The first shipboard quad installation was on the gunnery-training ship (ex-battleship) USS Wyoming (AG-17) on 22 June 1942, and the first twin installation was on the destroyer USS Coghlan (DD-606) on 1 July 1942. |
| | The USA started a massive production program for these weapons, with a total of about 39,200 being built by the end of the war. |
| www.navweaps.com /Weapons/WNUS_4cm-56_mk12.htm (5404 words) |
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