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).
Blueprint of an instrument panel featuring thermometer terminals and range selecting sockets.
| Identifier | ExFiles\Box 175\4\ img129 | |
| Date | 1st May 1931 guessed | |
| Thermometers, Galvo and Battery Terminals, Range Selecting Sockets, 0 20 20 40 40 60 60 90, DEGREES CENT, OFF, 1, 2, 3, 4, 5 | ||