Design for a 20 HP louvered bonnet with shorter louvres at the top.
| Identifier | ExFiles\Box 102\6\ scan0038 | |
| Date | 8th May 1926 | |
| done on top set of the plates 9826 DySS E 53993 3.750 4.000 20 HP LOUVRED BONNET 1 1/2" SHORTER LOUVRES AT THE TOP (B) ROLLS-ROYCE, LIMITED PRINT ROOM. 8 MAY 1926 DERBY | ||
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).