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).
Cover sheet for a 10,000-mile trial commencing in November 1934.
| Identifier | ExFiles\Box 5a\4\ 04-page117 | |
| Date | 1st November 1934 | |
| 21-G-IV 10,000 miles commencing Nov. 1934 | ||