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 comparing balancing cams for Bentley I, Bentley II, 20/25, 25/29, and 'Big Bore' models.
| Identifier | ExFiles\Box 136\1\ scan0184 | |
| Date | 30th March 1936 | |
| FULL LINES SHOW 20/25, 25/29 AND BENTLEY II. DOTTED LINES SHOW BENTLEY I. ROLLS-ROYCE LTD. PRINT ROOM 30 MAR 1936 COMPARISON "BENTLEY I" AND "BIG BORE" BALANCING CAMS. DERBY. F.F.H. 26/3/36 | ||