6cc10 tube tesla czech republic preamp tubes valve 6sn7 DD getter valve rare ~ b65 6sn7 

one piece = one tube 6cc10 tesla made in czech republic

 tested balanced TV7D/U tube tester military calibrated full emission 120/114 on TV7D/U tube tester military calibrated Reference good is 50/50 on TV7D/U tube tester

fat black base 

twin mica 

double DD getter slanted 

professional tube 

mega rare

preamp valve 

box 120