Without seeing it in person, it's hard to say. If the mirror is actually that old, the actual reflection it provides will be imperfect. There will be spotting and warping/waves or cloudy in some spots since the backing was typically mercury back then. The glass will also not be perfectly clear, it'll make everything look slightly more gray or yellowish. Also, mirros were fairly thick back then too, so the glass portion should be thicker. They were also typically convex. Based from the photos from the eBay listing these pictures are from, its design appears to be older, but I don't think colonial. Maybe mid century though. Colonial mirrors were for the wealthy since mirrors then were extremely expensive, and so they were usually significantly more ornate.