Book excerpt: 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. Kovels' New Dictionary of Marks: 1850 to the Present will help you identify your pieces. Kovels' New Dictionary of Marks provides the quickest and easiest way for professional and amateur collectors to identify more than 3,500 American, European, and Oriental marks. The perfect companion to the Kovels' original best-seller, Kovels' Dictionary of Marks -- Pottery and Porcelain: 1650 to 1850 (still in print after more than 42 years and 41 printings), Kovels' New Dictionary of Marks is the most comprehensive reference for nineteenth- and twentieth-century marks. Together, the two volumes are an indispensable guide to porcelain and pottery marks of the last four centuries. Also available from Three Rivers Press, Kovels' Dictionary of Marks--Pottery & Porcelain: 1650 to 1850