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