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).
Comparing the weights of Phantom III crankcase castings from two different suppliers.
| Identifier | ExFiles\Box 142\4\ scan0047 | |
| Date | 26th November 1936 | |
| LL Smith 1202 26-11-36 Alum Castings Mr. Robotham, Exp. Dept. Herewith are the weights of Phantom 3 Crankcase Castings to compare the difference between R.R. Castings and Castings made by the B'ham. Alum. Co. R.R. Castings. { 1 casting 155 1/4 lbs, 1 " 155 3/4 " B'ham. Alum. Co. Castings. { 1 " 154 ", 1 " 154 1/4 " A Clarke | ||