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).
The dispatch of 12 'Mirallite' test pieces for tensile, Upton-Lewis, and Stantom tests.
| Identifier | ExFiles\Box 37\4\ scan 133 | |
| Date | 17th May 1917 | |
| Mr. Clark. X.3041 BD{Mr Berend} 17.5.17. 12 test pieces of Mirallite sent to Mr. Purdon. 6 tensile X. 3039 3 Upton-Lewis X.3040. 3 Stantom X.3041 Stamped M 2. (Sgd) A.K. | ||