Drawing of a 3 1/2 Litre S.S. Crankcase Rear Oil Seal Cover.
| Identifier | ExFiles\Box 126\5\ scan0135 | |
| Date | 31th August 1938 guessed | |
| 3 1/2 LITRE S.S., CRANKCASE REAR., SS. {S. Smith} 9., OIL SEAL COVER., 2 5/32", 9/32, 31/32, 4 5/16", 5/16 RAD:, NO 6, 1/4", 1/8", 5/8", 3/8", .150, 3 17/64", 3 1/2", 2 7/16", S.H., 1/4, 3/16", 5/16", 5.HOLES, DRILLED .3248 DIA:, 15°, 4 5/16", 2 1/16", 27 1/2°, 2 5/8", 2 1/4", 3 11/32", 2.525, 1 1/4", 4 9/16", 6 1/8", 3/4", 13/16, 2. HOLES, TAPPED, 5/16 DIA: | ||
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).