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 request to place an order for 12-volt B.T.H. and Rotax aero booster coils.
| Identifier | ExFiles\Box 164\5\ img247 | |
| Date | 3rd July 1936 | |
| (6017) To Roy.{Sir Henry Royce} Hs{Lord Ernest Hives - Chair}/Wst.9/JH. 3.7.36. Will you please order for us to Order No. 55241 - 1 [struck through] - 12 volt B.T.H. aero booster coils. 1 - 12 " Rotax " " " type N.876 Hs{Lord Ernest Hives - Chair}/Wst. [Handwritten note]: Alter to one | ||