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).
Plans for building two further automatic guns following trial completion.
| Identifier | ExFiles\Box 176\1\ img059 | |
| Date | 6th September 1940 guessed | |
| When trials with these two guns have been completed, a further two automatic guns will be put in hand, one built up from the parts of gun No. 11239 and the other built up from new parts to be manufactured. These will be instructed when the design is settled. Ve. | ||