Sales are limited to USA only.
GE-made International Harvester labelled 6550: 1 pair, NOS, straight bottle, $200/pair JJ KT88: 1 matched pair $100, 25 hours use RCA 6550: 1 pair, both date code 7826, straight bottle, 25 hours use, $150/pair SED =C= 6550C: 1 matched pair, NOS, $200/pair Valve Art KT88: 1 matched pair, NOS, $100/pair
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