April 24, 2024
Matched quartet 1540 (6L6, 6P3S-E) tube 1960 VERY RARE!
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Matched quartet 1540 (6L6, 6P3S-E) Unique soviet end tubes 1960 RARE!Matched 4 pcs.tested unique soviet end tubes 1540 .Tube 1540 is the direct equivalent of 6L6 and 6P3S-E, produced for military applications. Never used, from old stock, new, in original pack.Millitary rhombus, "OTK" stamped. Made in Tashkent city , at the secret military factory in 1960 . Very, very rare! Actual photo: See my other items!
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