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).
Notification regarding the updated speedometer calibration for the 20/25 HP chassis.
| Identifier | ExFiles\Box 59\2\ Scan031 | |
| Date | 22th May 1930 | |
| EFC. X4308 BY/Cgh{W Clough}4/G.22.5.30. 20/25 HP. SPEEDOMETERS. ------------------- With reference to EFC3/AD.20.5.30. please note that on the 20/25 HP. chassis the instruments are now calibrated for 730 revs. per mile. BY/Cgh.{W Clough} | ||