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 detailing drilling instructions and dimensional callouts for a component.
| Identifier | ExFiles\Box 173\3\ img031 | |
| Date | 16th March 1934 guessed | |
| 5/32 DRILL - 2 HOLES BEFORE SAWING 5/32 DRILL - 2 HOLES THRU EACH BOSS 20° 35° 7/32 3/8 1/2 25/32 9/16 1 1/8 7/16 41/64 1 29/32 V U T S R Q P O N M L K J I H G F E | ||