KT66 7581A NOS röhre GENERAL ELECTRIC GE TUBE MATCHED QUAD VALVE ~ CV1075 VT75 6L6

NOS NIB 7581A KT66 GENERAL ELECTRIC MADE IN USA 

ORIGINAL VINTAGE POWER TUBES 

SAME CODE ON GLASS HB 188-5 

TEST TV7 = 46/46/44/44 (REFERENCE GOOD 25) 

GREY PLATE 

BLACK BASE 

OO GETTER SIDE 

CLEAR GLASS 

CLEAR TOP 

COPPER RODS 

ORIGINAL CARTON BOX 

MADE IN USA 

HIGH QUALITY POWER TUBES AMP

ULTRA RARE TUBES FOR POWER AMPLIFIER 

LAST STAGE AUDIO

BOX 129