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(!!!) (Best Single) 403A Western Electric NOS "D" getter 1957 (8.7ma)
(!!!) (Best Single) GB-5654=6AK5 Sylvania Gold Brand nickel pins 1970's (8.5ma)
(!!!) (Single) 403A Western Electric NOS "D" getter 1957 (5.7ma)
(!!) (Best Single) JW-6AK5 Western Electric NOS "D" getter 1953 (6.2ma)
(!!) (Single) 403B=5591=6AK5 Western Electric NOS "O" getter halo 1958 (5.0ma) (special quality)
(!!) (Single) 403B=5591=6AK5 Western Electric NOS "O" getter halo 1958 (5.2ma) (special quality)
(!!) (Single) 403B=6AK5 Western Electric NOS "O" getter halo 1969 (5.3ma)
(!!) 403A=6AK5 Western Electric "D" getter like new 1966 (7.5ma)
(!!) 403A=6AK5 Western Electric NOS "D" getter 1971 (6.8ma)
(!!) 403A=6AK5 Western Electric NOS 1974 (6.6ma)
(!!) 403A=6AK5 Western Electric used/good 1970 (8.2ma)
(!!) 403B Western Electric NOS D getter 1956 (7.0ma)
(!!) 403B=6AK5 Western Electric "D" getter used/good 1947 (4.8ma) (1st version)
(!!) 403B=6AK5 Western Electric "O" getter NOS 1981 (4.8ma)
(!!) 403B=6AK5 Western Electric NOS "O" getter 1980 in 1979 box (5.8ma)
(!!) 6AK5 Western Electric NOS "D" getter 1955 (5.8ma)
(!) JHS-6AK5 Sylvania NOS 1954 (5.5ma)