(!!) 6AS7G Russian branded National NOS 1990's (50ma/86ma)
(!!) 6AS7G Russian branded National NOS 1990's (51ma/77ma)
(!!) 6AS7G Russian branded National NOS 1990's (62ma/65ma)
11.20.19 (!!!!!) (Best Black Plate Pair) 6AS7G RCA black plates NOS 1950's (70/100ma and 70/94ma)