Photograph of a disassembled large-caliber automatic weapon or cannon, showing the barrel, breech, and firing mechanism components.
| Identifier | ExFiles\Box 176\1\ img224 | |
| Date | 19th May 1942 guessed | |
| ", | ||
From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).