(!!) 6L6GAY Sylvania brown base NOS 1956 aged 48-hours (73ma)
(!!) 6L6GAY Sylvania brown base NOS 1956 aged 48-hours (84.2ma)
(!!) 6U5 Tungsol NOS 1948 bright eye (1 in stock)
(!!) 6V6GT Philco by Sylvania tests like new 1957 (42.2ma)
(!) (1 Pair) 31 Sylvania rebranded Zenith NOS 1940's (12.8ma and 13.6ma)
(!) (Recommended Single) X-99 RCA Cunningham Radiotron engraved base NOS 1930's (2.5ma) (X-99=UX-199=CX-299)
(!) 30 Philco engraved base NOS 1930's (3.7ma)
(!) 31 Ken Rad NOS engraved base 1940 era (11ma)
(!) 31 Tungsol NOS 1940's (11.8ma)
(!) UX-199 RCA Radiotron NOS original box 1920's (2.3ma)
(1 Pair) 31 RCA/Cunningham NOS 1930's - 1940's (12.0ma and 13.2ma) (Same Gm)
(BEST PRICE) 35W4 Mixed US Brands used/good (4 tubes for $12.99)
(BEST PRICE) 3C6=XXB Philco NOS (4 for $17.99)
(BEST PRICE) 42 Mixed US Brands used good (4 for $44.99)
(display tube) UV-99 Radiotron brass base 1920's - lights up but does not have emission
(display tube) UV-99 Radiotron brass base 1920's tarnished base - lights up
(display tube) UV-99 Unknown maker - does not work
12J7G Philco Sylvania 1940's like new (100/60)
17DQ6B used/good (4 in stock)
1A4=1A4G National Union engraved base used/like new 1930's