Drawing comparing the profiles of two tested rods.
| Identifier | ExFiles\Box 60\2\ Scan064 | |
| Date | 1st May 1941 | |
| Tested Rod A 59367 A 59668 C.L.m. 1.V.41. | ||
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).