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).
Request for two blueprints of tracings for the Dalby Watson Optical Indicator.
| Identifier | ExFiles\Box 79\3\ scan0099 | |
| Date | 18th September 1918 | |
| To Mr. Walker. from EFC. EFC2/T18.9.18. X.3181 - RE DALBY WATSON OPTICAL INDICATOR Will you kindly supply two blue prints off each of the accompanying tracings, X.R.67/8 and oblige Experimental Dept. D.O. EFC. | ||