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Half wave and full wave rectifiers

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

U52 Mullard AMERTY on glass U52 top jagged mica, black plate with large D-ring getter Holy Grail rare pair 5U4G CV575 tested 100%

Mullard Amerty type U52 £ 700 pair

U52 Mullard CV575 ribbed plate square getter holy grail brown base double top mica tested 100% matched pair

Mullard CV575 U52 rare ribbed plate square getter £ 700 pair

U52 Mullard HELIX top mica RED PRINT ultra rare rugged plate large D-getter Holy Grail 5U4G CV575 pair tested 100%

Mullard U52 5U4G Red Print HELIX mica rugged plate D-getter £ 1,000 pair

U52 Mullard red paint AMERTY ‘long cone shape’ rugged plate, large D-getter jagged top mica Holy Grail 5U4G CV575 pair 100%

Mullard AMERTY U52 red paint rugged plate D-ring getter £ 900 pair

U52 Osram 5U4G brown base Square getter Blue cobalt logo km4 code Z tested 100% pair

Osram U52 5U4G blue logo £ 575 pair