I collect all sorts of variations of old clay and plastic chips. The chips you show are indeed the PA-CW chips in Seymour's book. Not sure what monogram thing you are refering to. I have three versions of that Boston Terrier design. Besides yours, I have two plastic versions. The bottom left in my photo has one injection mark in the dog's forehead. The one at the bottom right has two marks and a little nib high above the dog's head. It's also very light and translucent.