(!!!!!) (Good Value Pair) 12BH7A Sylvania gray pinched plates NOS and used 1970 era (7.6/8.0.4ma and 7/7ma)
(!!!!) (Best 12BH7A 1957) 12BH7A Sylvania gray oval plates "square=D" getter halo NOS 1957 (13.0/12.7ma)
(!!!!) (Best Overall GE Single) 12BH7A GE ribbed plates NOS 1981 (11.6/11.8ma) 1-3% section balance
(!!!!) (Best Overall Pair) 27 Philco by Sylvania NOS 1940's (7.0ma and 7.0ma) 1% matched
(!!!!) (Best Pair #2) 6F8G Sylvania and Sylvania Zenith parallel black ribbed plates like new 1940's (8.2/7.8ma and 8.0/7.0ma) 1-3% matched (very close Gm)
(!!!!) (Best Pair) 27 Philco by Sylvania NOS 1940's (6.3ma and 6.3ma) 1% matched
(!!!!) (Best Single) 12BH7A GE ribbed plates NOS 1980 (10.0/10.2ma) 1-3% section balance
(!!!!) (Best Single) 12BH7A Sylvania rebranded GE black oval plates "U" getter NOS 1956 era (11.2/14ma)
(!!!!) (Best Value Single) 10 Sylvania "engraved base" 1930's used/good (23ma)
(!!!!) (Best Value Single) 12BH7A Sylvania gray oval plates "square=D" getter halo NOS 1950's (7.6/8.8ma)
(!!!!) (Good Value Pair) 8SN7GTB Sylvania GM Delco "chrome top" NOS 1957 same build (6.4/7.2ma and 7.4/6.2ma) (Schiit Freya, Rogue, Modwright OPPO, Cary) (1-5% matched)
(!!!!) (Recommended Pair) 27 Philco by Sylvania NOS 1940's (6.0ma and 6.3ma)
(!!!!) (Recommended Pair) 27 Philco by Sylvania NOS 1940's (6.4ma and 6.7ma)
(!!!!) (Recommended Single) 12BH7A Sylvania gray oval plates "O" getter halo NOS 1962 (10.2/11.8ma)
(!!!!) (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)
(!!!!) (Single) 10 Sylvania "engraved base" 1930's NOS (29ma)
(!!!) (Best Overall UV-99) C-299=UV-99 Cunningham NOS 1920's with tube data sheet (3.4ma) (highest Ma) (UV have small pins)
(!!!) (BEST PAIR) 7AF7 Sylvania NOS gray round plates NOS 1950-1958 (8.5/8.7ma and 9.2/9.2ma) 1-5% matched (same Gm)
(!!!) (Best Value Pair) 6B4G Sylvania NOS 1952 same build (76ma and 80ma)
