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42 Philco used/good 1940's (30.8ma)
42 RCA used/good 1940's (27.2ma)
42 Sylvania engraved used good 1940's (30ma)
42 Tungsol used/good 1940's (27ma)
42 Tungsol used/good 1940's (30ma)
42 Tungsol used/good 1940's faded printing (33ma)
485 Sylvania NOS 1940's (5.5ma)
4C35 Kuthe Labs made for Marconi NOS 1951 (1 in stock)
4C35 Sylvania Hydrogen Thyratron NOS (1 in stock)
4X150A=RCA NOS 1970 sold as-is
56 GE used/good 1940's (4.2ma)
56 Made in Holland NOS 1940's (5.1ma)
56 National Union engraved base used/tests like new 1930's (6.0ma)
56 National Union used/good 1940's (5.3ma)
56 National Union used/good 1940's (5.9ma)
56 National Union used/good 1950 small faded getter (4.1ma)
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)
