Two, NEW in box, Sylvania manufactured 6SN7GTB tubes. Yellow-green printed logo bases, black, angled T-plates, chrome dome silvering. Tested on a Hickok TV-3 military tester that has been calibrated, just to make sure. Firm bases, excellent silvering. Tubes are matched for dynamic gain and structure- test at 3250-3187 and 3125-3125 where pass/fail is 1625 micromho.  They have the same structure inside and out, having date codes of "jf" and "af", 4 months apart in early 1972.

Many other lots of tubes for sale this week.

Shipping is free within the continental US. Elsewhere- exact postage only, no packing feee