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Half wave and full wave rectifiers

U52 Brimar 5U4G STC Standard Telephones & cables smooth plate full cup getter tall glass pair tested 100% NOS

BRIMAR STC 5U4G U52 akin 274B £ 750 pair

U52 Brimar brown base Square getter black plate original boxes holy grail 5U4G pair tested 100% NOS

Brimar U52 black plate original boxes GBP 550 pair.

U52 BRIMAR early type with engrave logo on base! 5U4G ribbed plate large D getter holy grail rare

Rare BRIMAR U52 with engraved logo on base £ 800 pair

U52 Brimar STC Standard Telephones and Cables tall glass patented design ultra rare black plate large pinched cup getter 5U5G tested 100% pair

Brimar STC U52 tall glass cup getter £ 1,000 pair

U52 GEC CV575 tall glass black plate Square getter original boxes 5U4G KB/Z pair audio rectifiers

GEC U52 CV575 original boxes £ 575 pair

U52 GEC large white logo black plate cup getter 5U4G CV575 CV1071 pair audio rectifiers tested 100%

GEC U52 wide white logo cup getter £ 600 pair

U52 Marconi 5U4G type 10E/373 Z code with arrow Military grade cup getter black base 5U4G CV575 CV1071 pair tested 100%

Mullard U52 10/E373 military grade £ 600 pair

U52 Marconi Large red logo, tall glass 5U4G black plate cup getter pair audio rectifiers tested 100%

Marconi U52 large red logo cup getter £ 600 pair

U52 Marconi red label codes RJ 4 JJ 4 black plate brown base Square getter 5U4G CV575 CV1071 pair rectifiers tested 100%

Pair Marconi red and green paper logo £ 575