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 different types and quantities of dynamo brushes.
| Identifier | ExFiles\Box 50\5\ Scan003 | |
| Date | 25th February 1921 | |
| X.4333. 25.2.21. X.3945 - LIST OF DYNAMO BRUSHES. 4 Link C.M.3 Morganite brushes for Bijur dynamo on Packard Car. (X. 2 Link C.M.4. and 1 E6 Morganite brushes for Lucas A.400 dynamos. 4 Link H.M.6 Morganite brushes for Bijur dynamo on Packard car. 12 Link H.M.6 Morganite brushes for R.R. dynamo made from starter motor parts. 8 Z Le Carbone brushes for R.R. dynamo made from starter motor parts. 3 Link C.M.9 Morganite brushes for Lucas E.575 dynamo. 15. E.G.3 Morganite brushes for Smith dynamos and 1 C.M.6. 6 Link E.G.3 Morganite brushes for Goshawk dynamo. X.3533. 6 Link H.M.6 Morganite brushes for Goshawk dynamo. X.3533. 6 Link C.M.9 Morganite brushes for Goshawk dynamo. X.3533. R.R. 558A (10M D) (S.H. 798) 16-12-20 O 2947 | ||