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).
Request to obtain one Tungar type 27 Platinum rectifier valve from Motoradio Ltd.
| Identifier | ExFiles\Box 168b\1\ img250 | |
| Date | 1st July 1930 | |
| G2 6153 To Lon. c. to Hythe Exp. RV/B.12/H.A.C. 1.7.30. Re R.A.E. Will you please obtain as soon as possible, from the Motoradio Ltd., Merton Street, High Holborn, LONDON. E.C., one Tungar type 27 Platinum rectifier valve. HAC. | ||