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 various types of aero sparking plugs.
| Identifier | ExFiles\Box 58\2\ Scan155 | |
| Date | 3rd October 1934 | |
| X1812a Roy.{Sir Henry Royce} From Hs{Lord Ernest Hives - Chair}/Wst. Hs{Lord Ernest Hives - Chair}/Wst.8/MA.3.10.34. AERO SPARKING PLUGS. Please order for us to order No.54002. 4 dozen K.L.G. type 836 B plugs. 4 dozen Lodge X400B plugs. 2 dozen Lodge X420B plugs. Hs{Lord Ernest Hives - Chair}/Wst. | ||