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).
Outline drawing of an ignition coil with multiple views and dimensions.
| Identifier | ExFiles\Box 54\4\ Scan054 | |
| Date | 10th September 1922 | |
| OUTLINE 002178 X4654 7/32 DIAM 4 HOLES 3 2 2 3/8 1 1/4 4 7/16 2 9/16 25/32 1 15/16 7 M.M. WIRE 31/32 13/16 2 3/4 IGNITION COIL 10-9-22 FULL Russell OUTLINE 002178 | ||