I bought two cases of these things from a company in Russia when I owned Atma-Sphere OTL poweramps. The amps have been gone for months, and it's now time to be rid of these tubes. These are all marked 6H13C and with the Winged-C, and all are marked with dates in the 1980s. I've tested them in 2 testers AND in my amps; all pairs of triodes test closely, and all results are close to all other results. All have original Russian cartons. I have 24 tubes plus one with a red dot on its top, for what I don't recall. The first person to buy 8 tubes gets the 'reddot' for free.Atma-Sphere gets $26 each for these; mine are only $15 each. I'll consider offers for lots of tubes at a lower price. A pair will pack nicely with lots of padding in a FlatRate PM Medium box for $12. For more tubes than 2, I'll calculate. PayPal only and to PP-registered addresses only. US addresses only.
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