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).
Sketches showing alterations to two separate parts with updated dimensions.
| Identifier | ExFiles\Box 91\2\ scan0347 | |
| Date | 26th October 1937 | |
| .400 +5 (NOW .625) .315 R .300 (NOW .525) ALTERATION TO G-85200 GRIND 5.6885 DIA. -1 ALTERATION TO E-86615 UNIT Nº 13 32 EX G.E DRAWINGS WILL FOLLOW WRP 26-10-37 | ||