6EM7 RCA coin-base used (2.5ma/28ma)
6EM7 Sylvania coin-base NOS 1970's (1.5ma/73ma)
6EM7 Sylvania coin-base NOS 1970's (2.2ma/60ma)
6EM7 Sylvania NOS 1960's (1.7ma/75ma)
6EM7 Sylvania NOS 1970 (1.5ma/47ma)
6EM7 Sylvania Silvertone NOS 1960's (1.5ma/55ma)