6Q7 GE metal can NOS 1958 (36/20)
6Q7 Tungsol metal can NOS 1950's (35/20)
6Q7G Sylvania used good 1940's (32/20)
6Q7G Tungsol used strong 1940's (38/20)
6Q7GT Coronado 1940's tests like new (39/20)
6Q7GT Philco used/good 1947 (32/20)
6Q7GT Sylvania NOS 1947 hairline crack in base (30/20)
6Q7GT Zenith by Sylvania NOS 1946 (39/20)
6Q7GT Zenith NOS 1950's (31/20)
6Q7GT Zenith NOS 1950's (34/20)
