Vintage RARE Large Duchess Purple Thistle Dinner Plate 10 3/8" #1. This is a nice Duchess "Thistle" pattern dinner plate. It measures 10 3/8" across, and 5/8" high. Bottom has stamped markings. It is in excellent condition with no chips or cracks, only a few scratches from use, not abuse. I have two of these on ebay right now, this is #1.