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 record log for a tall coil, part number 5TG3.
| Identifier | ExFiles\Box 45\4\ Scan225 | |
| Date | 17th January 1924 | |
| TALL COIL RECORD. Coil No. 5TG3. X. No. 4079 Date. | Service on. | If on car miles run. | If on test notes re use. | Total miles run. | Remarks re performance. 1-5-23 | Received. | — | — | — | In mouldensite case. 3-5-23 | Bench tests | — | Production tests + quantities obtained. | — | 8-5-23 | On 7.G.II | 5,400 | — | 5,400 | Fitted to 7GII in place of 7GI which was returned as faulty. 9-7-23 | Off 7GII | — | — | — | Failed due to losses in material of case when hot. Ret.d to Prodn to be put into new case. 17-7-23 | On 7GI | Miles reading when put on = 5,439 | Miles reading when taken off 4,312 | 8,873 | Rec.d from Prod.n in Redmanol case. Put back on 7GII. 20-12-23 | Off 7GII | — | — | — | Replaced by TRI. 17-1-24 | Lab. | Superseded by .25" taller coil of 18,000 turns. 97 Z 9Z | ||