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).
Requesting to fit a Weston Ammeter (30-0-30 range) to J.B.IV after it passed bench tests.
| Identifier | ExFiles\Box 168\5\ img307 | |
| Date | 6th November 1934 | |
| RHC.{R. H. Coverley - Production Engineer} From Ha/Wst. Ha/Wst.3/MA.6.11.34. WESTON AMMETER 30-0-30 RANGE. Will you please arrange to fit to J.B.IV. the above ammeter which has satisfactorily passed our bench tests. Ha/Wst. | ||