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 showing drilling instructions and dimensions for a circular component.
| Identifier | ExFiles\Box 173\3\ img018 | |
| Date | 13th March 1934 guessed | |
| 9/32 DRILL - 2 HOLES BEFORE SAWING 9/32 DRILL - 2 HOLES THRU EACH BOSS Grid Letters Vertical: V, U, T, S, R, Q, P, O, N, M Grid Letters Horizontal: L, K, J, I, H, G, F, E Dimensions: 20°, 3/16 R, 7/32, 3/8, 1 1/2, 55°, 61/64, 1 29/32 | ||