You may be the owner of a valuable piece of porcelain or pottery, but the cryptic symbol on the underside of the piece may be your only clue to its value. Kovel

Shows and identifies more than thirty-five hundred American, English, and European trademarks for porcelain and pottery, and indicates period of use for each ma

Ralph and Terry Kovel are proud to present the most authoritative and current art pottery book on the market, Kovels' American Art Pottery: The Collector's Guid

Lists monograms and identifying marks used by more than ten thousand American silversmiths from 1650 to the present.