G73R TUBE TELEFUNKEN GERMANY PREAMP TUBES MATCHED PAIR BLACK COATED DIAMOND LOGO <> BETWEEN PINS 

TWO TUBES TELEFUNKEN MADE IN GERMANY VINTAGE OLD PRODUCTION

PRICE IS FOR TWO TUBES = 2 VALVES = TWO VACUUM TUBES  

TESTED STRONG  100/100 ; 100/104 TV7 TUBE TESTER (56 IS THE REFERENCE) 

STRONG emission balanced and matched between them, 

original Telefunken Germany tubes with embossed diamond <> between pins 

BOX 140