centerpiece
1. A finishing stamp, usually ARABESQUE , blocked
in the center of the cover and generally used in
combination with center pieces or corner stamps.
It was a popular form of decoration in the late
16th and early 17th centuries. Also called
"centerstamp." 2. A piece of metal, usually
embossed and engraved, and fastened to the cover
of a book. (236 ,
259 )