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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

U52 Marconi red and green label black plate full cup getter 5U4G CV575 CV1071 pair rectifiers tested 100%

Marconi Green and Red label cup getter £ 600 pair

U52 Marconi red label 5U4G black plate cup getter CV575 CV1071 matched pair 100%

Marconi U52 red label £ 600 pair

U52 Marconi red paper logo 5U4G Z8254 on glass black plate cup getter CV575 CV1071 pair 100%

Marconi U52 red paper logo full getter black plate £ 600 pair

U52 MARCONIPHONE rare early Marconi U52 5U4G black plate cup getter CV575 CV1071 pair tested 100%

Marconiphone U52 black plate cup getter £ 600 pair