Auction is for one matched pair (2 tubes), rare 6N23P Reflektor Holy Grail SWGP Silver Shield ECC88 6DJ8 E88CC 6922 CCa in Reflektor tube plant in Saratov USSR in 1975.
These are real gems, low noise and nicely selected and matched from big batch. Never opened boxes!
They are tested on calibrated Tesla BM215M tester for plate current and tested for hum and noise in preamplifier.