(!) 6AH4GT Hytron by Sylvania "D" getter NOS 1953 (29.3ma)
6AH4GT GE used/good 1955 (20ma)
6AH4GT Hytron By GE "D" getter low/hours/like new 1950's (21ma)
6AH4GT RCA NOS 1960's (17.5ma)
6AH4GT Sylvania chrome top NOS 1950's (22ma)
6AH4GT Sylvania rebranded GE low hours/like new 1960's (27ma)