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).
Experimental reductions of cutout contact breaker spring necks on various chassis models.
| Identifier | ExFiles\Box 50\1\ Scan070 | |
| Date | 29th May 1925 | |
| X4105 EFC {E. Fowler Clarke - Electrical Engineer} /T29.5.25. NECKS OF CUTOUT CONTACT BREAKER SPRINGS EXPERIMENTALLY REDUCED ON VARIOUS CHASSIS. X4105 X8740 .125" 98-NK. .137" 6-GII. .150" 44PK or 46-PK. EFC. {E. Fowler Clarke - Electrical Engineer} | ||