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 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 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 & 1650 to 1850
This book is a comprehensive listing of vintage dinnerware information. It is arranged by type of mark, which enables the reader to compare marks found on the backs of dishes and locate the name of the manufacturer.
My only criticism is that you might have to look in several different places to see marks from the same company. There is an index at the back that you can use to find multiple listings for companies.
If you are interested in old china, this book is a terrific resource.