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).
Index card for the 'Silver Ripple' spring suspension mechanism, file 1305.
| Identifier | ExFiles\Box 97\3\ scan0132 | |
| Date | 9th June 1939 | |
| HOOC. : Rm.{William Robotham - Chief Engineer} By/Ald.{F. Allwood - Experimental Design}1/AW. 9.6.39 Silver Ripple IH.B.V & 33.G VII Spring Suspension Mechanism file 1305 | ||