Design illustrations for a 4 1/4 Litre Bentley Drop-Head Coupe with concealed head by H.J. Mulliner.
| Identifier | ExFiles\Box 89\3\ scan0025 | |
| Date | 27th July 1939 guessed | |
| 4 1/4 LITRE BENTLEY H.J.MULLINER & Cº Lᵀᴰ DROP-HEAD COUPE WITH CONCEALED HEAD DRAWING Nº 6124. HJM 501 | ||
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).