True NOS Amperex PQ 7308 White Label Made In USA. Many say the best 6DJ8 ever made. As Yogi used to say, "you can look it up".Matching date codes 66-37. I bought 2 pair from a retired Navy CPO a few years ago who tested and labeled them at 26 and 27, new on his tester. Keeping a pair for myself, one is in my phono stage and the best I've tried. No guarantees, no returns Paypal only, Free Shipping
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