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).
Instructions for drilling and reaming 8 holes for .125 diameter taper pins with a boss in position.
| Identifier | ExFiles\Box 29\2\ Scan229 | |
| Date | 3rd December 1929 guessed | |
| 1.125" +3 -3 8 HOLES DRILL & REAM FOR .125 DIA TAPER PINS WITH BOSS F78818 IN POSITION | ||