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).
With a table of figures for chassis 185'B'n, a Weymann body.
| Identifier | ExFiles\Box 3\3\ 03-page060 | |
| Date | 7th June 1912 guessed | |
| Chassis 185'B'n X200 Weymann bal- 13 3 21 bm- 11 1 21 W/S 25 1 off | ||