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4211E Top Pip STC Standard Telephones & Cables 211 VT4C audio and transmitting triodes

STC 4211E power triodes Top Pip GBP 5,000 quartet.

Early Ediswan type R GBP 180.

R type balloon  by ES GBP 150.

HK2 by BTH British Thomson-Houston GBP 100.

DER balloon metal base GBP 250 pair.

215A Western Electric boxed GBP 50.

Wecovalve 4215A boxed GBP 40 each.

Standard STC valve boxed GBP 40 each.

4215A British B4 base GBP 50.

4215A standard GBP 25 each.

H12 by Osram GBP 25.

Hivac XL GBP 25.

Tekade (branded Symphony) type 4K60 GBP 150.

Siemens & Halske type Ca of 1928 GBP 250.

Telefunken REN2204 double triode early type GBP 150.

Pair Telefunken EVE173 GBP 500 pair.

AEG K1 GBP 350.

KTD T1 GBP 350.

Siemens & Halske K1 GBP 800 pair.