Go for it! I'd love to see your mother's circle pins. I didn't think I'd wear my Mom's, but I really like it. It's got a very retro florentine finish to the gold parts.
And the clasp is great. I've never seen another clasp like it. It has a sort of bullet shaped end that covers the point of the pin, and sort of pulls out and then pushes back in, unlike the sideways circle lock that most pins have.
I'm very swayed by a good clasp. A good clasp makes all the difference to me as to how often I wear a piece of jewelry.