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).
Side elevation blueprint with dimensions for a Hooper Limousine on a Buick chassis.
| Identifier | ExFiles\Box 41\3\ Scan036 | |
| Date | 25th February 1921 | |
| MESSRS. ROLLS ROYCE. LTD. No. 921. 25. 2. 21. HOOPER LIMOUSINE. ON BUICK. SCALE . 3/4" = 1FT. 108 46" 26 16" 4.2 24" 30" 36" 20" 10" 15" 10" 18 B/arm C/of/arm 31 1/2 ok 32 ok 16" 33 3/4 ok 23" | ||