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).
Inquiry to Dunlop regarding the delivery of 20/25 silent tread tyres and the status of tests on Phantom Three tyres.
| Identifier | ExFiles\Box 157\2\ scan0001 | |
| Date | 9th June 1936 | |
| 1332 9.6.36. HEALEY, DUNLOP, PHONE, BIRMINGHAM. WHEN WILL DELIVERIES OF 20/25 SILENT TREAD TYRES COMMENCE. HOW ARE WEAR NOISE TESTS GOING ON PHANTOM THREE TYRES . ROBOTHAM, ROYCAR. | ||