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8 Pcs Winged C 6550
4 Pcs 6H30P-DR - 1980 made Nos Tubes
Totaly: 12 tubes
All tubes double tested on Legendary tester Amplitrex AT-1000
Great sound quality.
Tags: audio research ref-110 power tubes set - winged c 6550 + 6h30p-dr super tubes