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Half wave and full wave rectifiers

GZ30 GZ32 5V4 GZ33 GZ34 5AR4 GZ37 CV1377 52KU 53KU CV378 etc.

52KU Cossor BVA black plate round getter white print on glass GZ32 5V4G equivalent pair rectifiers tested 100%

Cossor 52KU white print on glass £ 350 pair

52KU Cossor green label black plate BVA GZ32 5V4G 5Z4G equivalent also CV593 pair rectifiers tested 100%

Cossor 52KU Green label boxed £ 400 pair

53KU Cossor CV378 KB/K GZ37 ST fat shape pair audio rectifiers clean top large getter tested 100%

Cossor 53KU brown base £ 400 pair

53KU Cossor GZ37 Square getter British made yellow print CV378 GZ33 U54 pair tested 100%

Cossor 53KU GZ37 yellow print rare £ 250 pair

53KU Cossor Yellow Print label rare GZ37 large shoulder shape matched pair valves tubes tested 100%

Cossor GZ37 53KU yellow print £ 400 pair

53KU Early Cossor black ribbed plate, full round getter GZ37 CV378 pair rectifiers tested 100%

Cossor 53KU black plate early type £ 450 pair

GZ32 DARIO MINIWATT code on base R7 U FA full D getter quartet valves clean top mint NOS 52KU 5Z4

GZ32 DARIO MINIWATT £ 380 quartet

GZ32 DARIO MINIWATT £ 200 pair

GZ32 Mullard Holy Grail black plate ful getter 1950s made code on glass 1653 52KU 5AQ4 pair tested 100%

Mullard GZ32 large full getter rare £ 400 pair

GZ32 Mullard Made in Great Britain BVA 52KU 5Z4G CV593 5AQ4 5V4 same code R71 B7A4 tested 100%

Mullard GZ32 R71 code £ 90 pair