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).
Wiring diagram for a Bosch GZA Trembler Ignition Coil.
| Identifier | ExFiles\Box 49\5\ Scan206 | |
| Date | 23th March 1921 | |
| XA281. Connections of Bosch GZA. Trembler Ignition Coil .164mf. Primary .67ω. Secondary 2,640 ω. E 6 1 2 5 4 to. H.T. Magneto FGA | ||