BU Roll Of 1964-D Dimes

i recently purchased a few rolls of silver BU dimes. the first roll I'm going through is 1964-D. I would say 70% of the roll is the pointed 9, and 30% blunt 9. close to half/if not more of the roll have rpm's.

I'm going to post 3 pics of a rpm I need some help with identifying, 4 of the coins out of the roll have this same MM. my thoughts is FS-501, but I'm not sure.

Thanks in advance!!

1964-D, pointed 9. all picture are of the same coin/mm, just different angles.