Jim, someone else mentioned pewter as well. They are much harder and smoother than any pot metal I've seen. I didn't have to do anything to them, and the wippen cushion was only a little dirty-not like when brass is used. This piano continues to amaze me as I work on it. The wippens are original and were quite reusable. The ORIGINAL leather key bushings will also be retained, the keys simply don't wobble. Yet the piano has been played regularly though not heavily, enough to wear out the hammers. David
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