It is hard to identify colors from a computer scan. Here is a random picture from the internet showing a 220 carmine (left) next to a 219D lake (right). Yours doesn't look dark enough to me to be a 219D lake. Note that the Scott Catalog also lists a dark carmine shade variety that yours could be, since it appears a little darker than the typical carmine 220 but not dark enough for a lake 219D.

The two imperforate margins (straight edges) are completely normal and simply means that your stamp was the upper right stamp from a pane of 100 stamps where the top and right sides were not perforated. These are not listed in the catalogs, except perhaps in the general glossary of a straight-edge or descriptions about how sheets of stamps are printed.