Decorative plate surrounding a keyhole, usually of brass, but sometimes of ivory in the Federal era.
Also may be called a “key plate.”
The keyhole escutcheons with the plain type are either vertical ovals or are circular with small nailing holes top and bottom. The ovals are about an inch and a half high by an inch wide. The circular ones are about an inch and a half in diameter.
With the ornate handles, the keyhole escutcheons have a scrolled outline with arched top and the face has foliage scrolling done in relief.
Thanks to the Furniture Glossary for the text of this post.