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).
Data table comparing different S.U. carburettor needles for Bentley vehicles.
| Identifier | ExFiles\Box 31\5\ Scan079 | |
| Date | 15th July 1933 guessed | |
| RRA. RRB. RRC. RRD. RRE. 89 89 89 89 89 86 86 86 86 86 81.6 82 81.6 82 81.6 77.5 78 78 78.5 78.3 74 74.5 74.5 75 75 70.8 71.3 71.3 71.8 71.8 68.3 68.8 68.8 69.3 69.3 65.5 66 66 66.5 66.5 62.5 63.2 63.2 63.8 63.8 60 60.5 60.5 61.1 61.1. 57.5 58 58 58.6 58.6 54.7 55.2 55.2 56 56 52 52.5 52.5 53.2 53.2 RRA. RRB. RRC. RRD. RRE. S.U. NEEDLES (BENTLEY) | ||