(!!!!) 12BH7A Sylvania pinched plates NOS 1966 (10.5/15.4ma)
(!!!) (Best Value Single) 12AX7 GE NOS 1967 (Gm=1300/1400)
(!!) 12AX7 Motorola by Westinghouse gray pinched plates "D" getter NOS/75% 1960 era (Gm=1300/1300 and 0.7/0.7mA) (same plate structure as 5751)
