56 RCA Balloon engraved base black plate tests like new 1930's (4.7ma)
56 RCA no name NOS 1940's getter halo screen loose at bottom of tube (6.5ma)
56 RCA no name NOS 1940's made for Radiotelefonica Argentia (5.1ma)
56 RCA used/good 1940's (4.7ma)
56 RCA used/good 1940's plate slightly tilted (4.9ma)
56 Super Airline used/good 1940's (4.1ma)
56 Sylvania branded RCA NOS 1946 (6.0ma)
56 Sylvania NOS 1940's (5.8ma)
56 Tungsol rebranded Raytheon tests like new 1940's (6.1ma)
56 Ultron UK used/good 1952 (4.5ma)
5719 Sylvania Gold Brand NOS 1952 (similar to 6AD4) (4 in stock)
6299 NOS
6A5G Sylvania 1940's low hours/like new (72ma)
6A5G Sylvania rebranded Ken Rad NOS 1940's (114ma)
6A5G Sylvania rebranded Philco engraved base NOS 1930's (79ma)
6A5G Sylvania rebranded Philco NOS 1940's (123ma)
6AC5GT Sylvania NOS 1940's (39/21)
6AN4 RCA NOS original boxes (1 pair)
6BC4 NOS (20 in stock)
6BN4A US Brands NOS (12 in stock)
