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).
Diagram of a duplex press button switch for a new Phantom sequence starter.
| Identifier | ExFiles\Box 64\3\ scan0272 | |
| Date | 3rd February 1926 | |
| THE COLORED CONDUCTORS REFER TO TECHNICAL DIAGRAM LEC 2194 LEC 2199 SAME TYPE OF BOLTS & NUTS AS USED ON SINGLE TYPE SWITCH STARTER DUPLEX PRESS BUTTON SWITCH FOR NEW PHANTOMCodename for PHANTOM I SEQUENCE STARTER Sect 2.2.26 ROLLS-ROYCE, LIMITED RECEIVED DESIGN ROOM 3 FEB 1926 LEC 2199 SCALE | ||