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).
Log of modifications for the 40/50 HP Chassis, detailing changes and completion dates.
| Identifier | ExFiles\Box 154a\3\ scan0013 | |
| Date | 21th February 1931 | |
| -2- 40/50 HP. Chassis Cont'd.{John DeLooze - Company Secretary} Date Issued. | Stn.Sht. No. | Title. | Date completed. | Series where Chassis brought in to Test 19.8.30 | X.7380 | Universal Type Subframe. | 5.11.30 | N.2. 26.8.30 | X.7190 | Oil Drain Plug in Side of Engine Case. | 28.1.31 | N.2. 18.10.30 | X.7470 | Adjustable Pedal Stems. | 9.1.31 | N.2. 11.12.30 | X.7230 | Phantom II Exhaust System altered to 20/25 HP.sch. | 21.1.31 | When available. 10.7.30 | X.7260 | Four ventilating panels in bonnet. | 11.2.31 | N.2. 4.12.30 | X.7410 | Rear road spring with Rolled Eyes. | 21.2.31 | N.2. 24.7.30 | X.7500 | Shallow tank radiator -wider dash and bonnet over-lapping dashboard. | 11.2.31 | N.2. 18.10.30 | X.7250 | Turbulent Flow Radiator Tubes. | 11.2.31 | N.2. 18.10.30 | X.7250 | Radiator Cap with anti-splash valve. | 11.2.31 | N.2. | ||