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).
Hand-drawn sketch of a built-up cylinder block with cylinder bases welded in pairs.
| Identifier | ExFiles\Box 22\5\ Scan136 | |
| Date | 7th July 1925 guessed | |
| x 407 WELD BUILT UP CYLINDER BLOCK. CYL BASES WELDED IN PAIRS. | ||