Photograph of a spiral bevel pinion and crown wheel gear set.
| Identifier | ExFiles\Box 111\4\ scan0056 | |
| Date | 1st September 1938 | |
| 1.9.38 RR F1628S GB3377 SZN RRGE 37-8 G 38 | ||
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).