Excellent. Labeled and tucked away.
For anyone that cares, I've done a quick and sloppy illustration. It shows what characteristics led me to the plating.
First is the inner frame lines. Combined with, it's not Orange Brown, means this stamp is an 11A. That narrows it down to plates, 1L, 2L, 3 and 5L. The rest can be found in the picture.
