up for bid is a vintage set of G E 6550A vacume tubes as shown I tested them on my Weston 981 3b mutual conductance tube tester and with a reject point of 1300 the # 1 tube reads a strong 2150 and the #2 reads a strong 2250 both with no shorts or leaks both of the guide pins are off of the bottom so I drew an indicator line on the side of the tube the way it should be inserted into amplifier code on tube reads CJ over 188-5