(!!) 13EM7 RCA black base black plates NOS 1960's (1.1ma/37ma)
13EM7 GE branded ITT NOS 1960's (2.2/38ma)
13EM7 GE branded Philco NOS 1963 (1.2/39.5ma)
13EM7 GE branded Raytheon NOS 1960's (1.6/40ma)
13EM7 Silvertone Sylvania low hours/like new 1963 (1.3/43ma)
13EM7 Sylvania branded GE NOS 1963 (1.5/34ma)
13EM7 Sylvania NOS 1960's (1.6/53ma) best single
