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).
And providing the chassis numbers for the introduction of Helsby cables.
| Identifier | ExFiles\Box 162\1\ img088 | |
| Date | 27th October 1936 | |
| To B.y. Cricklewood Oct 27th 36 Helsby cables Would you please let me know the Chassis Number when the Helsby cable was introduced. so that the Depots' can be informed. J H Hancock Phantom III 171st Chassis "A" Series 25/30 HP 12th " "N-2" " Bentley 184th " "H" " Ry/ld. 28/10/36 | ||