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).
Modification instructions for a Contact Plate and Switch Bases, referencing specific alteration numbers.
| Identifier | ExFiles\Box 168a\2\ img403 | |
| Date | 19th December 1938 guessed | |
| -2- In addition :- EB.1896 - Contact Plate. EB.1898 - Switch Base. (Tufnol). EB.1925 - Switch Base. (Moulded). have been modified in accordance with Alteration No:s :- 5512/D, 5513/D and 5514/D, respectively, and the existing pieces should be altered. One set of HPS{Horace Percy Smith - Experimental Factory Mgr}'s blueprints are sent herewith to Roy{Sir Henry Royce}/Les.{Ivan A. Leslie} This completes the instructions. BY/[Signature] | ||