(!!!!) (BEST SINGLE) 7581A GE tan base green printing 1960 era (73.5ma)
(!!!!) (SINGLE) 7581A GE tan base NOS 1965 (62ma)
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)
