Rare New Old Stock (NOS) 6SJ7 valves from Fivre, manufactured in the 1950s for the Italian military. Full metal base construction with smooth silver shield — never used, still in original packaging.

Each unit is individually tested for transconductance & emission over original datasheet specifications. Known for low noise, excellent linearity, and robust shielding — ideal for RF and preamp stages in high-sensitivity audio circuits.

Available as matched pairs or singles, with full documentation upon request.