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).
Blueprint detailing a design for an improved water system component.
| Identifier | ExFiles\Box 179b\3\ img246 | |
| Date | 16th February 1933 guessed | |
| THIS PIPE TO BE C THROUGH CASING IN CONVENIENT POS .550 TAP .625 DIA 16 TPI CYLS AS SHOWN ON DES 1769 M IMPROVED WAT SCALE 1/8 & 2/1 C | ||