Index of files relating to V-tubes, designs, and broken parts for the 25 HP and Phantom II models.
| Identifier | ExFiles\Box 13\5\ Spare05-page103 | |
| Date | 8th September 1931 guessed | |
| x7600. x5600. FILES. V. {VIENNA} tubes for 25 HP. N.S.3300 V. {VIENNA} tubes for P.II. N.S.3303. Latest design for 25 HP. N.S.3356. Parts that have been broken on the bump. N.S.3322. Ws/Les. | ||
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).