Two, NEW in box, Sylvania 6SN7GTB tubes. Red-orange printed logos, 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 3375-3250 and 3375-3187 where pass/fail is 1625 micromho.  They have the same structure inside and out, having date codes of "AGA" and "ACL", early and mid 1963.

Many other lots of tubes for sale this week.

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