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).
Internal order request for two single-pole knife switches from Sun Electrical Co.
| Identifier | ExFiles\Box 168a\2\ img131 | |
| Date | 18th May 1934 | |
| Roy.{Sir Henry Royce} From Ha/Wst. Ha/Wst.8/MA.18.5.34. Will you please order for us from the Sun Electrical Co., two single pole knife switches 30 amperes mounted on a slate base No.Y6002 in their catalogue. Order No.54001. Ha/Wst. | ||