Wade Bequest collection of valves: DER triode radio valve, by Marconi-Osram. Early dull emitter triode valve. With BBC stamp and serial number 11499. With B4-3 base and top seal. Paper label: W17.
Details
- Category:
- Electronic Components
- Object Number:
- 1972-343/104
- type:
- triode valve
- credit:
- Wade, J.C.F.