Probably most were in the Treasury vaults & melted. See: Per Wikipedia: Under the Act, 270,232,722 standard silver dollars were converted into bullion (259,121,554 for sale to Great Britain at $1.00 per fine ounce, plus mint charges, and 11,111,168 for subsidiary silver coinage), the equivalent of about 209,000,000 fine ounces of silver
I'm sure I've seen it posted here before, but: https://www.us-coin-values-advisor.com/Incredible-Tale-of-the-1903-O-Morgan-Silver-Dollar.html
No matter what the grade Riff, you made a nice find. Pays to keep your eyes open. My grade would be VG.
C'mon guys. When the lines in the cotton bolls are that deep, it's F15. Show me a grading guide that disagrees. Yeah, I know it would be discounted price wise for the problems. OP, you did well, anyway you slice it.