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 the engine timing diagrams for Buick and Bentley.
| Identifier | ExFiles\Box 124\3\ scan0256 | |
| Date | 4th December 1934 guessed | |
| BUICK TIMING. IO 13½ EC 43½ IC 66 EO 68½ .008 CLCE. BENTLEY TIMING. IO 10½ EC 13½ 59½ IC 56½ EO .008 CLCE. | ||