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).
Record sheet for the testing and inspection of experimental dynamo number 438.
| Identifier | ExFiles\Box 51\1\ Scan375 | |
| Date | 7th November 1923 | |
| 20 HP. EXPERIMENTAL DYNAMO RECORD SHEET DYNAMO:- 438 Date. Location. Particulars. Chassis Miles reading. Total dynamo miles 11 Aug 1923 79.A.O. +2-brushes & comm OK. Not tested by exptl. 1883 ~10000 30 Oct 1923 Lab For inspection. 7. Nov. 1923 Repair dept. For replacement. Inspected, reported X.4383 | ||