Internationally, and I have a digital copy of the Krause coin catalog, most premium numismatic commemorative coins are done in Sterling Silver 0.925 by tradition, if not then for the Type collector in a Nickle Copper version in some cases.
The RCM have in the last ten years begin to Issue 9999 bullion grade commemoratives in favor over the traditional 0.925, I don't know why, I missed the original Press release.
Thanks for the comment @djohan
$10 Bahamas Independance 1973 Sterling Silver
The RCM have in the last ten years begin to Issue 9999 bullion grade commemoratives in favor over the traditional 0.925, I don't know why, I missed the original Press release.
Thanks for the comment @djohan
$10 Bahamas Independance 1973 Sterling Silver
You have so much knowledge on silver