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).
Three photographic views of a B.G. Paris spark plug.
| Identifier | ExFiles\Box 58\2\ Scan029 | |
| Date | 24th February 1932 guessed | |
| B.G PARIS 116 | ||