1945-D Mercury Dime ‘Blue Russet’ MS66 PCGS. OK, this Mercury dime is not a proof, but it is deliciously toned and was the only non-proof coin in the Keyman Collection that I acquired, so I am listing it in this category. Deal with it. The point is, it’s nice and has those lovely blue colors that Keyman seemed partial to. Ex: Keyman.