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 the cross-sectional details of various Bentley hub caps.
| Identifier | ExFiles\Box 159\7\ scan0191 | |
| Date | 1st March 1938 | |
| 6 1/2 LITRE Nº62. 8 LITRE Nº80. NOTE DIFFERENCE IN SECTION OF MATERIAL P.Bz. INSERT 4 1/2 LITRE, STANDARD. 8 LITRE MODIFIED. DETAILS OF BENTLEY HUB CAPS. BENTLEY MOTORS (1931) LTD O.W. | ||