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 alphanumeric reference codes.
| Identifier | ExFiles\Box 177\5\ img156 | |
| Date | 11th January 1936 | |
| X4542,P5/R1,77, X4543,G1,75, X4551,S6,80, X4567,T1/U,81, X4569,G2,75, X4572,M3/N,77, X4582,P4,77, X4595,C2,74, X4604,E1,74, X4614,G2,75, X4616,S8,81, X4636,M3/N,77, X5375,R5/S1,78, | ||