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).
To Mr. Clark regarding 12 test pieces sent to Mr. Coverley.
| Identifier | ExFiles\Box 37\4\ scan 123 | |
| Date | 4th July 1917 | |
| X.3040 Mr. Clark. 4.7.17. 12 test pieces sent to Mr. Coverley stamped A.F. X.2746 X.3039 X.3041 X.3040 A.K. R.R. 238 B (380 H) S.D. 442. 9-6-17 G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 1966 | ||