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 detailing bonnet dimensions for four different series.
| Identifier | ExFiles\Box 12\7\ 07-page015 | |
| Date | 30th December 1926 | |
| BONNET DIMENSIONS. *30.12.26 E.72755 V.{VIENNA} SERIES 25.625 26.900 21.150 27.625 46.500 E.73055 BEX W. SERIES 26.900 27.700 22.100 28.600 46.500 E.74637. E.A.C.VIII 12 EX 26.625 21.600 22.100 28.600 44.875 E.75120 E.A.C.VII 14 EX 26.525 21.600 22.100 28.600 45.050 ALL HEIGHTS ARE GIVEN FROM TOP OF FRAME TO ℄ BONNET HINGES | ||