6P3S-E 70's 6П3С-Е 5881 6L6GC 6L6GA Matched Pair NOS USSR.
LOT: 2 pcs (matched pair) of 6P3S-E tubes 70's years of production. Many amplifiers equipped with 6P3S-E tubes remain in constant service, and we’ve accumulated unique insights into their reliability and durability.