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).
List of alterations to a standard model with corresponding anticipated weight savings.
| Identifier | ExFiles\Box 132\2\ scan0144 | |
| Date | 10th July 1941 guessed | |
| -2- Alteration to Standard. Anticipated Weight Saving. Comments. Forward: 87 Light type duplex exhaust system. 20 Latest Senior Range clutch mechanism. 2½ Latest Senior Range engine mounting. 3 Front Bumper 12 lbs. Lighter Bumper Fittings. 12 Rear Bumper 12 lbs. 12 No wiring tubes. 4 Light horns, no horn relay. Light lamps, small spot lamp. Lucas distribution box. 7 Tacelmit instead of bijur lubrication. ? 2 Lighter Starter (Lucas) & Battery (Myth). Bentley belt driven dynamo. 6 Alum. Engine, light crankshaft & con. rods, 150 Lightest flywheel and clutch. 9 314 | ||