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 issue dates, reference numbers, and prices.
| Identifier | ExFiles\Box 174\5\ img235 | |
| Date | 18th June 1923 guessed | |
| Certificates. 1st issue J J Sept. 29th 1923 Nos.925720, 925719 for £20. Second issue. Oct. 29th 1924 £8 AA{D. Abbot-Anderson} 468031 " 13th 1924 £8 AA{D. Abbot-Anderson} 437725 " 13th " "8 AA{D. Abbot-Anderson} 384705 June 27th " "8 AA{D. Abbot-Anderson} 329042 1st issue. Marc.. 24th 1921 '4. } April 30th " 4. } May 28th " 4. } Price each Oct. 8th " 4. } 15/6 " 27th " 4. } Jan. 28th 1922 4. } March 3rd " 2. } 2nd Issue July 29th 1922 10. } Aug. 31st " 6. } Sept. 30th " 6. } Oct. 30th " 6. } | ||