401A Western Electric
407A LM Ericsson Sweden like new 1960's (41/26 and 42/26)
407A LM Ericsson Sweden used/good 1960's
407A Sylvania branded RCA gold pins used/good 1971
407A Sylvania branded RCA NOS 1977
407A Sylvania gold pins used/good 1960's
407A Western Electric like new 1968 in white box (54/26 and 64/26)
407A Western Electric NOS 1974 (32/26 and 34/26)
407A Western Electric used/good 1959 (32/26 and 34/26)
407A Western Electric used/good 1962 (35/26 and 42/26)
407A Westinghouse Canada NOS 1960's
415A Western Electric NOS 1960 (1 in stock)
415A Western Electric NOS 1970-1981 (25 in stock) (similar to 6AS6)
416B=6280 WE NOS
416C Western Electric
421A Western Electric (sold out)
448A Western Electric "tipped top" used/tests like new D getter halo 1965-1966 reboxed (1 Pair: 30ma and 31.8ma)
448A Western Electric tipped top used/good 1965 same date codes (1 Pair: 26ma and 27.5ma) (Matched on Amplitrex)
6AS6=409A Western Electric NOS 1955 (4.8ma)
6AS6=409A Western Electric used/tests like new 1951 (5.4ma)
