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).
List of certificates with corresponding dates, reference numbers, and prices.
| Identifier | ExFiles\Box 174\5\ img044 | |
| Date | 29th October 1924 | |
| -2- 29th Sept. 1923 2 certs. Nos. J 925719 & J 925720 each for £20. 27th June 1924 1 cert. AA{D. Abbot-Anderson} 329042 for £8. 13th Oct. 1924 2 certs. AA{D. Abbot-Anderson} 384705 & AA{D. Abbot-Anderson} 437725 each for £8. 29th Oct. 1924 1 cert. AA{D. Abbot-Anderson} 468031 for £8. | ||