here's something yesterday on the subject, from an ex-employee's post at DFO:
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"When I worked R&D at Z, Craigie did allow Paul and Leon C., on a special request, to pick through this small vault off the side of the Drummers Lounge. I was in there with them when they were picking through 14s to make a special set of hats for a top endorser. There’s many, many thousands of cymbals in this vault, and the reason they ended up that way was that most weren’t A-stock…. So, over time they just got pushed to the back of the row when cymbal orders were picked. (This is in no way to be construed that of the 200 examples Z picked recently are flawed soundwise or cosmetically… there was plenty of good stock in the vault, and that these recently release examples were undoubtedly vetted).
What is fascinating about these examples is that some were old enough to have hay (which was used as packing material way back when…) oxidized impressions outlined on them. They were pre .500 through hole, which I believe was incorporated 1962-63. Cymbals weren’t stamped until they were picked for orders and the Testers had the stamp rollers on the the Test room (so this does blow up a lot of “precious” timelines folks have out there about stamps... because of the nature of how the inventory was stored and revolved). The cup, hammering and especially lathing are best indicator on date/era of manufacture.
But the most fascinating thing about these cymbals was they are proof that metallurgically speaking, the bronze “sweetened” and opened up over time. You can hear that distinctly in these time-capsuled, unplayed examples. Some that might have been so-so or “bad” when new, but all had now a distinct prettiness that came with the long aging."
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nothin new there right?.
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https://www.drumforum.org/threads/armand-zildjian-ltd-ed-vintage-a-ride-%E2%80%94-memphis-drum-shop.181754/page-3#post-2146437