Set of Four WW2 German Telefunken Thermionic Valves

This is a Set of Four WW2 German Telefunken Thermionic Valves; two labelled LS50 and two with obscured labels but are probably RV2 4P700.

They haven't been tested and are sold as a collectible, for display only. The getter has turned white in one of the smaller valves.

The larger LS50, transmitter pentodes, were used in German WW2 portable shortwave transmitters such as the RS-20/M.

The smaller valves,  RV2 4P 700, were used in, for example, the Gurtelpeiler, a WW2 portable radio direction finder.

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