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).
Blueprint for a part named Wedge (Valve Spring Washer) for a 25 HP engine.
| Identifier | ExFiles\Box 47\3\ Scan415 | |
| Date | 5th May 1932 guessed | |
| Hs{Lord Ernest Hives - Chair} 590 .050 RAD. +2 -2 .430 DIA .445 DIA .250 DIA TAPER 1 IN 6 .031 SAWCUT .375 +5 -5 ALTERATION REDUCE .445" DIA TO .430" DIA. SCALE 4/1 E 50147 WEDGE (VALVE SPRING WASHER) 25 HP ROLLS-ROYCE LTD DERBY. | ||