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).
Order for 2 dozen Lodge D.13 sparking plugs for experimental use.
| Identifier | ExFiles\Box 79\1\ scan0168 | |
| Date | 26th February 1919 | |
| To O.O. from EH. X601 EH6/LG26.2.19. 26th. Feb. 1919. With reference to attached, will you please send an order to the Lodge Sparking Plug Co. Rugby., for 2 doz. sparking plugs - model D.13. These will be charged to us at 10/- each. They are not a part of our contract but are for Experimental purposes. EH. | ||