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).
Marked with a purple ink stamp from the Print Room in Derby.
| Identifier | WestWitteringFiles\V\2January1931-April1931\ Scan081 | |
| Date | 31th March 1931 | |
| ROLLS-ROYCE, LIMITED PRINT ROOM 31 MAR 31 DERBY. | ||