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).
Blueprint showing a modification for a Phantom II radiator filler cap.
| Identifier | ExFiles\Box 15\1\ Scan217 | |
| Date | 10th February 1930 guessed | |
| RADIATOR FILLER CAP MODIFICATION PHANTOM II UNDERCUT 2.360 DIA X .150 WIDE RADIATOR CAP ALL OTHER DIMENS.NS{Norman Scott} AS ON E-70868 1.900 DIA 1.900 2.350 DERMATINE WASHER .125" THICK | ||