6N23P Reflektor Holy Grail 1974 SWGP Silver Shields Pair Tested 65-70% Perfect

One matched pair (2 tubes) - rare 6N23P Reflektor “Holy Grail” SWGP Silver Shield (ECC88 / 6DJ8 / E88CC / 6922 / CCa), produced at the Reflektor plant in Saratov, USSR, in 1974.

These are genuine gems: low-noise, carefully selected, and precisely matched. Two pairs available. Test results are written on the boxes, measured at 100V on the anodes and -1.5V on the grids.

Both tubes are very strong (well above 65% of nominal values) and very well balanced.

Tested on a calibrated Tesla BM215M for plate current, and additionally verified in a preamplifier for hum and noise.

Original 6N23P Reflektor factory print is present, though slightly faded with age.