(!!!!!) (Recommended Pair) 12BH7A GE gray oval plates "O" getter 1963 (12/12.5ma and 12/14ma) (Highest mA and Gm)
(!!!!) (Best Value Pair) 12BH7A Sylvania branded Philips NOS pinched plates 1982 (7.8/8.8ma and 8.2/8.8ma) (Same Gm) (Art Audio, Quicksilver, Rogue, Universal Audio)
(!!!!) (Best Value Pair) 12BH7A Sylvania branded Philips NOS pinched plates 1982 (8.4/9.4ma and 8.7/9.2ma) (Same Gm) (Art Audio, Quicksilver, Rogue, Universal Audio)
(!!!!) (Black Plate Single) 12BH7A RCA branded Westinghouse narrow black plates NOS "U" getter mid-1950's (7.2/8.4ma) (1st series made)
(!!!!) (Recommended Pair) 12BH7A GE NOS 1970's (9.2/9.4ma and 9.2/10.2ma) 1-5% matched
(!!!!) (Recommended Single) 12BH7A GE NOS gray oval plates 1962 (8.8/10.0ma)
(!!!!) (Recommended Single) 12BH7A Sylvania Hammond gray oval plates "D" getter halo used/like new 1959 (10.2/10.6ma)
(!!!!) (Recommended Single) 12BH7A Sylvania Hammond gray oval plates "D" getter halo used/like new 1959 (9/9ma)
(!!!!) 12BH7A Sylvania pinched plates NOS 1966 (10.5/15.4ma)
(!!!) (Best Single) 12BH7A Sylvania branded "E/A" pinched plates NOS 1967 (8.6/8.8ma) 1-2% section balance
(!!!) (Best Single) 12BH7A Westinghouse gray ribbed plates NOS 1967 (10.6/10.8ma)
(!!!) (Recommended Single) 12BH7A CBS Oval Black Plates "O" getter NOS 1960 (9.2/13ma)
(!!!) (slightly microphonic 1950's) 12BH7A RCA black plates "D" getter NOS mid-1950's (14.0/15.2ma)
(!!!) (Slightly microphonic Single) 12BH7A CBS Oval Black Plates "U" getter NOS 1960 era (8.4/9.0ma)
(!!!) 12BH7A RCA branded Zenith NOS 1970 era (10/13.2ma)
(!!!!) (Best RCA Pair) 12BH7A RCA gray ribbed plates NOS 1965-1970 (10.8/14.7ma and 10.4/13.8ma) (Highest mA and Gm)
(!!) (Recommended Single) 12BH7A Raytheon Black Plates "D" getter NOS 1955 (11.5ma/14.8ma)
(!!) 12BH7 Raytheon Black Oval Plates large "U" getter NOS 1954 (9.6ma/13.8ma)
(!!) 12BH7A National by Sylvania gray plates used/good 1970's (7.2/7.6ma)
(!!) 12BH7A Philco Sylvania gray oval plates "O" getter halo used/good 1962 (6.5/7.3ma)
