Because a generous collector shared pictures of the Little Red Riding Hood Izannah Walker, we can compare a post-patent Izannah shoulderplate with a pre-patent shoulderplate. Apparently the post patent Izannahs are more rare. I never would have guessed that. The first 3 pictures are of pre-patent shoulderplates, where the 2nd skin is glued over the edge of the shoulderplate. The last picture is of the post-patent shoulderplate, where the shoulderplate was sewn onto the top of the body.