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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
5632=C3J RCA NOS
5637 Sylvania NOS 1953 in white boxes (3 in stock)
5639 Philips USA NOS 1980's
5639 Raytheon NOS (3 in stock)
5641=EY70 Sylvania NOS 1957 in white box (1 in stock)
5642=DY70 US Brands NOS (40 in stock)
5644 Sylvania Gold Brand NOS
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)
5651A RCA NOS 1972 (LAMM)
5651A Sylvania rebranded RCA NOS 1983 (1 in stock)
