I've gotten mixed reports on ivory resale. I last knew that you had to prove the ivory was taken before 1977(?) or else it fell under the Endangered Species Act and was forbidden for resale in the US and most other places. Since people who were taking ivory in the past didn't think they would ever stop killing elephants and walruses, they didn't bother putting date stamps on their keys, though I would imagine a piano produced in 1919 would have a date stamp for the whole unit which would pass muster.



I looked into it, some, for a questionable scheme I cooked up, a few years ago.