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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

5R4GY Brimar CV717 BRIMAR BVA on base ribbed plate square getter pair rectifiers 100%

Brimar 5R4GY ribbed plate square getter £ 300 pair

5R4GY Brimar CV717 KB/FB high voltage full wave rectifiers ribbed plate Square getters tested 100%

Brimar CV717 5R4Gy Square getter £ 300 pair

5R4GY Brimar CV717 rare type /FB JJ —–> brown base square getter 5R4GY MINT NOS pair tested 100%

Brimar CV717 rare JJ---> arrow /FB Square getter £ 400 pair

5R4GY Brimar KB/FE large silver halo around getter CV717 same code YD on glass pair tested 100%

Brimar 5R4GY KB/FE original box £ 300 pair

5R4GY Brimar made in England logo black plate ribbed plate code 3J4 and 3J6 on top glass CV717 tested 100% MINT pair

Brimar 5R4GY made in England £ 250 pair

5R4GY Brimar STC CV717 Black print letters ultra rare carbon plate double large square getter T-SHAPED TOP! 274B pair tested 100%

Brimar CV717 STC black plate 5R4GY T-Shaped top mica £ 800 pair

5U4G KENRAD KEN-RAD U52 same code on base SC961A ribbed plate D-full getter pair tested 100%

KENRAD 5U4G U52 VT-244 tested 100% £ 300 pair