nothing to be sorry about. It kind of hard to see the color difference, but it may just be from die chips or extra metal. Coop and the other resident experts should chime in soon, if not, sometime tomorrow. In my opinion, typically if I should be able to clearly see an S/S mint mark at that magnification, when I am looking under the microscope. I am overly picky and critical of RPM's because I try to sell them. I know what the customer wants to see, and I guess that drives me to be more critical.
I could be wrong and way off base about the Type I, but the Type I is extremely close. It doesn't have to be exact, since dies/punches eventually wear out, or if any are struck by hand, some aren't hit exactly square and can produce a funky outcome.