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 'Swithermet' case (S.V. 70 Large Type).
| Identifier | ExFiles\Box 39\4\ Scan140 | |
| Date | 4th September 1930 | |
| 50°, 26°, 1/2", 3.250" P.C. DIA., 3.375" DIA., .325"R.{Sir Henry Royce}, .050", 5 - HOLES .201" DIA ±.010", .200"R.{Sir Henry Royce}, 2.262", 1"/32 R.{Sir Henry Royce}, .468", 32/, .3937", 2.8917" DIA. EXT, 2.844" DIA. INT., 1.9685", .032" (21. S.W.G.), SWITHERMET" FOR ROLLS ROYCE. (S.V.70. LARGE TYPE.), SCALE:- 1/1, PART N.º, R.R. 20., DESCRIPTION, CASE "SWITHERMET", N.º OFF, 1., MATERIAL, BRASS, DATE, 4-9-30. | ||