(Osram KT2, KT63, KT61, KT66, PX4, U50, KT76, KT33C, KT71, U76 & U31 Advert)

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Wireless World, June, 1948.

Valves Advertised:

KT2, KT63, KT61, KT66, PX4, U50, KT76, KT33C, KT71, U76 & U31.

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