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 {Mr H. Royce - Buyer} /Les. This completes the instructions. BY {R.W. Bailey - Chief Engineer} /[Signature] | ||
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).