Hello, new here. I recently inherited Grandpa's collection and am going through them one by one, it's fascinating. I've been a on-off collector since childhood but this has really ignited a new passion! Anyway, I pulled these two mercury dimes out of one of his Whitman books because they were gleaming differently than the others. Are they proofs? The fields and strike appear so to me, but again i'm just learning again. I don't see the radial mint luster lines of a business strike, so another reason I ask. Thanks and look forward to more collecting! Mitch.