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(!) (BEST PAIR) 12D4 GE gray plate NOS 1961-1964 (52/40 and 52/40)
(!) (BEST PAIR) 12D4 RCA black plate NOS 1960's (52/40 and 52/40)
12D4 GE NOS 1964 (52/40)
12D4 Philco by Sylvania used/tests like new 1959 (62/40)
12D4 Raytheon used/good 1960's (46/40)
12D4 WG Co. by Sylvania used/strong 1959 (53/40)
