(!!!!) (#1 2C51 Single) 2C51 Tungsol black plates "D" getter halo NOS 1950's (6.0/6.8ma)
(!!!!) (#1 5670W GE PAIR) 5670W GE NOS 1972-1977 1-2% matched (highest Ma and Gm)
(!!!!) (#2 5670W GE PAIR) 5670W GE NOS 1971-1978 1-2% matched
(!!!!) (#3 5670W GE PAIR) 5670W GE NOS 1976-1978 2-3% matched
(!!!!) (#4 5670W GE PAIR) 5670W GE NOS 1973-1977 (2-3% matched)
(!!!) (#1 5670 Sylvania) JAN-5670=2C51 Sylvania NOS 1967 (8.0/8.6ma)
(!!!) (#1 5670 Sylvania) JHS-5670=2C51 Sylvania NOS 1966 (10.6/11.4ma) (highest Ma and Gm)
(!!!) (#2 5670 Sylvania) JHS-5670 Sylvania NOS 1965 (8.0/8.2ma)
(!!!) (#3 5670W GE PAIR) 5670W GE NOS 1982-1983
(!!!) (#4 5670 Sylvania) JHS-5670=2C51 Sylvania low hours/tests like new 1966 (8.6/9.0ma)
(!!!) (#5 5670 Sylvania) 5670=2C51 Sylvania low hours/tests like new 1960's (6.6/7.4ma)
(!!) JHS-5670 Sylvania NOS 1966 (8.5/10ma)
(!) (#3 5670 Sylvania) 5670 Sylvania NOS 1960 "D" getter halo (8.2/10.4ma)
(!) 2C51 Sylvania NOS 1960's (7.6/8.0ma)
(slightly microphonic pair) JG-5670=2C51 GE triple mica with D getter halo 1950's closely matched
(slightly microphonic) JG-5670 GE triple mica with D getter halo 1950's (9.8/12.6ma)
6385 Bendix
JHS-5670 Sylvania NOS 1966 tilted glass (10/13.4ma)
