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).
Service and performance log for a specific coil.
| Identifier | ExFiles\Box 49\5\ Scan047 | |
| Date | 27th March 1923 | |
| COIL RECORD. Coil Type:- PP No:- 3 X No:- 4273 Date. | Service on. | If on car Miles | If on test notes re use. | Total Miles Run | Remarks re performance. 15-8-23 | Received from production. | - | - | - | Std coil (intabalitis) but with layer of coton between layers of primary winding. 16-8-23 | On 3 G II | Miles reading start 8,795 | | | Miles reading on 31-10-23 - 12276. Replaced by TRI 19-6-24 | C | | Job completed | (coil now obsolete) | [Vertical text on right] X 4273 [Bottom left corner] 27.3.23. | ||