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420A WE NOS "D" getter 1962 (1.9/2.3ma)
420A WE NOS "D" getter 1970 (1.4/1.8ma)
437A Western Electric (sold out)
485 Sylvania NOS 1940's (5.5ma)
4BC5 NOS (20 in stock)
4BQ7A Raytheon Japan NOS (6 in stock)
4KR8
4RHH2=4BQ7A Raytheon Japan NOS (0 in stock)
52 NOS
53 Arcturus engraved base used/tests like new 1930's (72/38 and 73/38)
53 NOS
53 US Brands NOS (2 in stock)
53HK7 US Brands NOS (8 in stock)
55 Philco 1940's tests like new (52/24)
55 Philco used/good 1940's (52/24)
55 Sylvania NOS (2 in stock)
55 US Brands NOS (0 in stock)
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)
