8" silver plate; raised 1" border  of plate is embossed with grape vine design depicting buches of grapes, grape leaves, and branches. Detail can be seen on every leaf. The back of the plate carries a stamp with the words "QUADRUPLE PLATE" arcing above a spider web emblem containing a star in the middle with the letter "W" inside of the star.  Just beneath the spider web is the stamped number "39" and to the right of the stamp is the number "2773" etched into the plate.

I'm almost sure this is made of solid walnut (versus a dark stain).  The chair was newly upholstered when I bought it and the fabric is still in excellent condition.  There are a few nicks & scratches from being moved around, but it is still an attractive piece of furniture.