L63 6J5G 6J5 tube NOS Mullard Osram GEC MOV British preamp tubes 5 pieces strong

5 tubes = 5 pieces L63 tubes British made  tested twice

test on tube tester TV7D/U = 92/90/9080/78 (reference good at 50) 

reference 100% = 80

tested also on tube tester Funke W19S Ia (mA) = 17,5/17/16/14,5/14,5 (reference good at 10mA) 

all tubes same stock branded KR marketing , with own vintage carton box 

box 171