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).
List of experimental parts and modifications for a 40/50 Chassis.
| Identifier | ExFiles\Box 78\2\ scan0299 | |
| Date | 15th April 1920 | |
| X 346/b Extract from RHC{R. H. Coverley - Production Engineer}1/LG15.4.20. We give below a list of experimental parts which have been finished. X.3764. 40/50 CHASSIS. -------- ------------- X. No. | Parts fitted. | Engine. -------|---------------|-------- 3461. | Spanner. This is finished and submitted to Mr. Day. | 3912. | Modified shock absorber to arrgt. draw. N.3761. | Fitted to 49-GB, 2.EX and 4.EX. 3621. | Wire tube bracket N.131. Cancelled. | 2778c. | Modified Glovers wiring. | Fitted to 53 CW, and scrapped by Mr, Royce. 3645. | Improved bolt heads e sent to R.{Sir Henry Royce} | | ||