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).
Comparative table of specifications for half-floating axles on various car models.
| Identifier | ExFiles\Box 111\4\ scan0006 | |
| Date | 25th October 1937 guessed | |
| HALF FLOATING AXLES CAR | UPSET OR TAPER | OVERHANG | METHOD OF LOCATING BRG | DIA. OF SHAFT AT BRG PACKARD 120 | TAPER 1 IN 6 | 1.8 | SHOULDER INSIDE HUB & WASHER OUTSIDE | 1.500 CADILLAC 60 | TAPER 1 IN 16¼ | | SHOULDER INSIDE HUB & WASHER OUTSIDE | 1.532 OLDSMOBILE 1937 | UPSET | 2.625 | SHOULDER OUTSIDE SLEEVE PRESSED ON IN-SIDE | 1.532 VAUXHALL 25 | UPSET | | | 1.770 BENTLEY 8 LITRE | TAPER 1 IN 11 | 1.350 | | ROVER | UPSET | 2.437 | NUT OUTWARDS DIFF INWARDS | 1.375 LAGONDA | TAPER | 1.5 | | 1.57 | ||