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).
Alteration notice adding the overall pulley width and keyway width for a pulley and fan dynamo.
| Identifier | ExFiles\Box 135\4\ scan0055 | |
| Date | 28th March 1940 | |
| TO R.M. File 123/RD 1135 28-3-40 360 SECTION 8070 RD 487 - PULLEY & FAN DYNAMO ALTERATION OVERALL WIDTH OF PULLEY & WIDTH OF KEYWAY ADDED REASON D.O. OMISSION | ||