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(!!!) 35W4 RCA NOS 1971 (51/40)
(!!!) 418A Western Electric NOS 1952 original box (34ma)
(!!!) 418A Western Electric NOS 1952 original box (41ma)
(!!!) 5881 Tungsol used/good 1957 (58ma)
(!!!) 5U4GB GE NOS 1971 (58/40 and 61/40)
(!!!) 6B4G Tungsol NOS 1940's (81ma)
(!!!) 6CA4=EZ81 GE NOS 1980 (55/40 and 55/40)
(!!!) 6DE7 GE Canada black plates NOS 1967 (4.6/42ma) (Woo Audio)
(!!!) 6DE7 GE Great Britain made in Japan NOS 1970 (3.8/30ma) (Woo Audio)
(!!!) 6DE7 GE Great Britain made in Japan NOS 1970 (5.6/24ma) (Woo Audio)
(!!!) 6DE7 Sylvania black plates "U" getter NOS 1950's (8/31ma) (Woo Audio)
(!!!) 6V6G Super Silvertone by Sylvania used/good 1930's (37ma)
(!!!) 80 RCA Victor NOS 1948 (56/40 and 58/40)
(!!!) CX-301-A Cunningham NOS 1930 era (2.6ma Gm=800)
(!!!) CX-331 Cunningham NOS 1920's (12ma) (rare)
(!!!) CX-380 Cunningham Balloon used/good 1930 era (46/40 and 56/40)
(!!!) JAN-5814A Sylvania NOS 1967 (8.4/9.2ma)
(!!!) JAN-5814A Sylvania NOS 1967 (8.6/11.2ma)
(!!!) USN-CRC-1629=VT-138 RCA NOS 1940 (bright eye) (oldest single)
(!!!) UX-213 (sub for Type 80) Rectron Balloon 1920's used/60% thropiated tungsten filaments (38/40 and 38/40) (rare)
