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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 Tungsol rebranded Raytheon tests like new 1940's (6.1ma)
56 Ultron UK used/good 1952 (4.5ma)
5608A Tungsol NOS made for Barber Colman (Wheelco Instruments) 1959-1971 (0 in stock)
5637 Sylvania NOS 1953 in white boxes (3 in stock)
5693 RCA red can used good 1958 scratches on metal can (2.5ma)
5694 Raytheon (sold out)
57 US Brands used/good 1930's - 1940's (6 in stock)
5702 US Brands NOS (2 in stock)
5702WA Raytheon NOS (8 in stock)
5702WB Raytheon NOS (11 in stock)
5703 Raytheon NOS 1950's (5 in stock)
5719 GE NOS 1953 (similar to 6AD4) (6 in stock)
5719 Sylvania Gold Brand NOS 1952 (similar to 6AD4) (4 in stock)
5722 Sylvania NOS (2 in stock)
5725=6AS6 US Brands NOS (200 in stock) ($1.49 each minimum 3 purchased)
