Matched Pair 6SN7 GT Fivre Italy # NIB # BLACK PLATE 45° 1950’s BLACK BASE YELLOW PRINTING ON GLASS TEST RESULTS TUBE 1: TRIODE 1= 110 (WHERE 50=100%) TRIODE 1= 110 (WHERE 50=100%) CODE 2N O GETTER TUBE 2: TRIODE 1= 110 (WHERE 50=100%) TRIODE 1= 110 (WHERE 50=100%) CODE F5L D SIDE GETTER coppia 5