2 x 6SN7gtb Sylvania Tubes*Black Plates*Very Strong Matched Pair*#6

2 GE Made 6BL7 MATCHED PAIR Audio Tubes TESTES STRONG Black Plates Used

2 x 6SN7gtb Sylvania/Philco Tubes*Black Plates*Very Strong Matched Pair*#7

2 Strong Matched Magnavox by SYLVANIA CHROME DOME Black Plate 6SN7GTA Tubes

2 x 12au7a Raytheon/Hammond Tubes*Black Plates*Very Strong Matched Pair*#6

Matched Pair GE 6SH7 metal tubes - Very Strong

Date Matched Pair CBS 6S4 6S4A Black Plate Vacuum Tubes Tested NOS on TV - 7

2 x 6L6 RCA Metal Tubes*Very Strong Matched Pair*WW2 1943-44*#7