
Wade Bequest collection of valves: 4104D triode radio valve

Wade Bequest collection of valves: 4104D triode radio valve, by STC. Spherical bulb with UV base and top seal. Paper label: W3.
Wade Bequest collection of valves: 4104D triode radio valve, by STC. Spherical bulb with UV base and top seal. Paper label: W3.