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KT66 Osram rectangular logo rare oversize smoked glass black plate CV1075 full getter EL37 6L6G quartet valves

KT66 Osram Oversize tall glass £ 1,000 quartet

KT66 Osram same code on glass!! Blue logo brown base smoked glass CV1075 EL37 6L6G with original boxes

KT66 Osram original boxes MINT £ 900 quartet

KT66 Osram VT75 very rare clear glass ST fat shape full round getter clean top holy grail quartet 100%

KT66 Osram VT75 on glass boxed £ 1,200 quartet

KT77 GEC EL34 equivalent same code on glass 7811 Z made at Hammersmith with original GEC boxes

KT77 GEC boxed £ 800 pair

KT77 GEC EL34 equivalent same code on glass 7811 Z made at Hammersmith with original GEC boxes

KT77 GEC boxed £ 800 pair

KT88 GEC audio output valve CV5220 6550 GEC logo quartet

KT88 GEC matched quartet £ 850

KT88 GEC classic audio output pentodes CV5220 excellent shape quartet

KT88 GEC £ 1,200 Quartet

KT88 GEC holy grail audio output pentode tested CV5220 matched quartet

KT88 GEC early type £ 1,200 quartet

KT88 GEC quartet selected best audio output valves tubes CV5220

KT88 GEC £ 1,000 quartet