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).
Performance and mileage record for coil type PP No. 1.
| Identifier | ExFiles\Box 49\5\ Scan045 | |
| Date | 27th March 1927 | |
| FAB COIL RECORD. Coil Type PP N°1 X. No. 4273 Date. Service on. If on car miles run. If on test notes re use. Total miles run. Remarks re performance. 15-8-23 Received from production — — — Std coil (bakelite) but with a layer of paper between each layer of primary winding. 16-8-23 On G1 Miles reading start = 967 3,323. No further record kept. 27.3.27. X 4273 | ||