6sj7 tube nos Fivre Italy preamp tubes metal base matched pair silver smooth plate blue label 

2 tubes 6sj7 Fivre Italy with box

tested stron on tube tester TV/D/U = 65 & 62 same emission for both tubes (reference good at 40)

 metal base & blue label on glass 

tube type pentode preamp 

6SJ7 = 6Ж8 = VT-116 = CV591

box 188

pair 2