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).
Filing cover page with a laboratory reference number and a print room date stamp.
| Identifier | ExFiles\Box 32\4\ Scan048 | |
| Date | 20th November 1933 | |
| LAB 28 ROLLS-ROYCE, LIMITED PRINT ROOM 20 NOV 33 DERBY | ||