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56 no name NOS 1950's (5.7ma)
56 Philco by Sylvania used/good 1940's (5.2ma)
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 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)
5610 GE NOS around 1960
5637 Sylvania NOS 1953 in white boxes (3 in stock)
5639 Philips USA NOS 1980's
5642=DY70 US Brands NOS (40 in stock)
5647 Sub-Miniature Diode
5651 RCA NOS 1960's (0 in stock)
5651 Sylvania NOS 1960's
5651 used/good (30 in stock)
5651A Raytheon NOS 1960's (1 in stock)
