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).
Production test table for a combined main and auxiliary switch unit.
| Identifier | ExFiles\Box 64\4\ scan0238 | |
| Date | 9th April 1929 | |
| PRODUCTION TEST TABLE of S.S COMBINED MAIN SWITCH AND AUXILIARY SWITCH UNIT. III. AUXILIARY SWITCH UNIT. Date. Unit Number. (1) Gap remarks. (2) Amperes (2.4 to 3.4) (3) Amperes (1.00 to 1.75) (4) Current amperes Remarks. 9-4-29 D OK 2.8 1.21 .85 Last switch turned out to version G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 10.1.29. | ||