6N8S / 1578 (6SN7) matchat par MELZ (Moskva) Sovjetunionen NOS Metal Base
RARE Military 50 tal.

Mer info:

6SN7GT / 6N8S MELZ (aka. 1578, 6H8C / 6Н8П) NOS
Double triode equivalent to or directly interchangeable with 6SN7GT and Chinese
6N8P,

The MELZ brand is considered to be the absolute highest quality 6SN7GT variant
from Soviet production. The quality is on par with the US-made NOS RCA 6SN7GT
; many say even better...

Skickar rekommenderat eller kan hämtas vardagar under arbetstid i Uppsala eller
vid Odenplan (Stockholm) kvällar eller helger.