Rare New Old Stock (NOS) 12AX7 (ECC83) dual triode valves from Fivre, manufactured in Italy during the 1950s. These are the original “first type” units featuring the iconic black plate, long 17mm glass envelope, and distinctive horseshoe-shaped getter — a hallmark of early European high-fidelity production.

Each tube bears the original yellow label

Key features:

• Black anode plate with fine internal structure
• Long 17mm ST-shaped glass envelope
• Horseshoe getter at the top (classic 1950s Fivre trait)
• Original yellow paper label with Fivre branding
• Made in Italy under strict military-grade quality control

These ultra-rare tubes represent the golden era of Italian valve engineering. Each unit is individually tested for transconductance & emission over original datasheet specifications.

Available as matched pairs or matched quads upon request, with full documentation and provenance.