6L6GC GE NOS 1964 broken center guide pin (61ma)
6L6GC GE tests like new 1964 broken center guide pin (87.5ma)
6L6GC GE Zenith low hours/like new 1960's in white box (61.5ma)
6L6GC Sylvania clear top NOS 1960's copper grid posts (68ma)
6L6GC Sylvania gray plate used/tests like new 1960's (66ma)
6L6GC Tungsol used/good around 1960 - broken center guide pin (73ma)
7581 Tungsol brown base used/75% 1964 (52.5ma)
7581A GE branded RCA NOS 1974 (59.5ma)
7581A GE branded RCA used/good 1973 (56ma)
7581A GE NOS 1979 (76ma)
7581A GE NOS 1979 (87ma)
7581A GE used/good 1974 (59ma)
