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).
Dalby-Watson Optical Indicator and the availability of an arc lamp for engines.
| Identifier | WestWitteringFiles\A\October1917\ Scan1 | |
| Date | 3rd October 1917 | |
| ORIGINAL. St.{Capt. P. R. Strong} Margaret's Bay. 2 To EFC from R.{Sir Henry Royce} c. to EH. c. to By.{R.W. Bailey - Chief Engineer} c. to DJ. Oct. 3rd. 1917 [STAMP] RECEIVED Re - Dalby-Watson Optical Indicator - X.3181. R5/W31017. With reference to your EFC3/T27917, regarding above, it would be a great advantage to indicate our engines, go ahead - We have an arc lamp specially ordered in stock. R.{Sir Henry Royce} | ||