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).
Confirming that Speedometer No. B.563 has been inspected and found to be O.K.
| Identifier | ExFiles\Box 50\4\ Scan282 | |
| Date | 14th January 1929 | |
| EFC. {E. Fowler Clarke - Electrical Engineer} X4308 ROY {Sir Henry Royce} /JT1/HP14.1.29. Speedometer No.B.563. Replying to yours EFC {E. Fowler Clarke - Electrical Engineer} 1/T9.1.29, the A.T. Speedometer Co.Ltd. have returned this instrument to us and report that they have taken same down and find it to be O.K. in every respect. ROY. {Sir Henry Royce} [Signature] | ||