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).
Promotional material for the Type SS Sangamo Time Switch.
| Identifier | ExFiles\Box 164\3\ img215 | |
| Date | 1st May 1938 guessed | |
| TYPE SS {S. Smith} SANGAMO TIME SWITCH AUTOMATIC TIME CONTROL FOR STREET LIGHTING SHOP WINDOW LIGHTING NEON SIGN, HEATING AND POWER CIRCUITS ON THE DIAL: NIGHT SANGAMO DAY TIME | ||