I noticed Amagi started selling 1921 Morgan dollars, advertising them as "1 Oz"
https://www.amagimetals.com/morgan-dollarUnless these are reproductions in a different size, they are not 1 ounce. Morgan dollars are .859 troy ounces total weight, which at .900 fineness is .773 troy ounces of silver. If they are reproductions this should be noted.