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).
Dimensional drawing of a 'Stelmar' lamp, showing two mounting fork options.
| Identifier | ExFiles\Box 61a\2\ scan0432 | |
| Date | 12th December 1934 guessed | |
| 17" 4 1/2" STANDARD STRAIGHT FORK STANDARD 1/2" OFFSET FORK 9" 5" 5/8" WHIT. 5 5/8" 6 1/4" OVERALL DIMENSIONS OF "STELMAR" LAMP. MESSRS BANTING & TRESILIAN LTD, 64 VICTORIA STREET, WESTMINSTER. S.W.I. | ||