Wade Bequest collection of valves: early triode radio valve
- PART OF:
- Wade Bequest collection of valves
Wade Bequest collection of valves: early directly-heated triode radio valve. Tubular bulb with B4-2 base and top seal. With paper label: W78.
Wade Bequest collection of valves: early directly-heated triode radio valve. Tubular bulb with B4-2 base and top seal. With paper label: W78.