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(!) 7F7 Sylvania rebranded GE parallel round gray plates used/good 1952-1953 (1.9/2.3ma)
7F7 Sylvania branded GE staggered round black plates 1958 used/good (2.1/2.3ma)
7F7 Sylvania parallel round black plates 1940's no printing (2.0/1.9ma)
7F7 Sylvania rebranded Philco parallel round gray plates used/good 1948 (1.9/1.8ma)
7F7 Sylvania round black plates used/good 1960's (1.9/1.7ma) (Gm like new)
7F7=VT-189 Sylvania rebranded GE round black plates used/like new 1943 (3.0/3.4ma)
