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(!!!) 231=31 US Made Balloon NOS 1920's (14.2ma)
(!!!) 31 RCA Radiotron Balloon NOS 1920's (13.2ma)
(!!!) 6B4G Tungsol NOS 1940's (81ma)
(!!!) 6SN7GTB Tungsol brown base "U" getter used/good 1950's (7.0/8.2ma)
(!!!) 6V6G Super Silvertone by Sylvania used/good 1930's (37ma)
(!!!) 76 Crosley by Ken Rad engraved base like new 1930's (5.7ma)
(!!!) 76 RCA NOS 1940's (6.0ma)
(!!!) 80 RCA used/strong new 1946 (54/40 and 58/40)
(!!!) 80 RCA Victor NOS 1948 (56/40 and 58/40)
(!!!) CX-331 Cunningham NOS 1920's (12ma) (rare)
(!!!) USN-CRC-1629=VT-138 RCA NOS 1940 (bright eye) (oldest single)
(!!) (#1 37 Pair) 37 RCA like new 1940's (7.7ma and 7.8ma) 1% matched
(!!) (#1 37 Pair) 37 RCA NOS 1940's (7.3ma and 7.5ma)
(!!) (#1 37 Pair) 37 RCA NOS 1940's (8.5ma and 8.5ma) 1% matched
(!!) (#1 800 black plate single) 800=VT-64 RCA black plate like new 1940's (52ma, Gm=2430) (tested on Amplitrex)
(!!) (#2 800 gray plate) 800=VT-64 RCA gray plate NOS late 1940's (47.5ma, Gm=2150) (tested on Amplitrex)
(!!) (1 Pair) 31 Cunningham NOS 1940's (11ma and 11.6ma)
(!!) (Best Pair) 10Y=VT-25 Sylvania NOS 1940's same build (26.5ma and 29ma)
(!!) (Best Pair) 2C26A National Union NOS 1940's (71/38 and 72/38)
(!!) (Best Single) 6V6GT=VT-107A National Union coated glass NOS 1943 (46.2ma)
