Shipping is extra but I’ll absorb the PayPal fees, if any.
Payment may be made by personal check after it clears, certified check/MO, or by PayPal. Sales are limited to USA only. Photos available upon request.
GE-made International Harvester labelled 6550: 1 pair, NOS, straight bottle, $150/pair
JJ KT88: 1 matched pair $50, 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, $150/pair
Valve Art KT88: 1 matched pair, NOS, $50/pair