(!!!) 7199 Sylvania branded GE NOS 1968 (11.5/6ma)
(!) (Best Sylvania Single) 7199 Sylvania NOS 1960's (14.2ma pentode, 6ma triode)
(!) 7199 RCA Black Plates branded GE NOS 1970 (13ma/6.4ma) (triode 70-75% Gm)
7199 RCA Black Plates used/good 1960's (8.5ma/6.4ma)
7199 Sylvania used/good 1960's faded printing (13ma pentode/6ma triode)
