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).
Photograph of main bearing upper halves from Unit E.S.B.G., Chassis B.117 J.Y., after 13,101 miles.
| Identifier | ExFiles\Box 131\2\ scan0068 | |
| Date | 13th October 1937 guessed | |
| UPPER HALVES UNIT E.S.B.G. (13,101 MILES) CHASSIS B.117 J.Y. MAIN BEARINGS. <-- 1 TO 7 --> 24730 (Markings on bearings: D 50 and numbers 1 through 7) | ||