How to Identify Pottery Marks: Guide to Maker's Marks & Stamps

Why Pottery Marks Matter

The mark on the bottom of a piece of pottery or porcelain is like a birth certificate. It tells you who made it, when, and where. A generic-looking vase could be worth $20 or $2,000 depending on the mark. Identifying pottery marks correctly is essential for accurate valuation at estate sales, thrift stores, and flea markets.

How to Read Pottery Marks

Most pottery marks include some combination of:

• Maker’s name or logo: The manufacturer (e.g., “ROSEVILLE” or the Meissen crossed swords)
• Pattern name or number: Identifies the specific design
• Shape number: Identifies the form (vase, bowl, platter)
• Size designation: Often a number indicating the height in inches
• Date code: Some makers used letter or number systems to indicate production year
• Country of origin: Required on imports to the US after 1891 (“Made in England,” “Japan,” etc.)

Valuable American Pottery Marks

Roseville Pottery (1890–1954)

Zanesville, Ohio. Early pieces are marked with an “Rv” ink stamp or “Rozane” wafer. Later pieces (1930s–1950s) have “Roseville, U.S.A.” impressed or raised in the mold. Common pieces: $50–$200. Rare patterns (Della Robbia, Olympic, Woodland): $500–$5,000+.

McCoy Pottery (1910–1990)

Most pieces marked “McCoy” or “McCoy USA.” Beware: a separate company (“Nelson McCoy”) also used the McCoy name. Common cookie jars: $30–$100. Rare cookie jars and planters: $200–$1,000.

Weller Pottery (1872–1948)

Zanesville, Ohio. Marks vary by era: early pieces have a small impressed “Weller” or a half-kiln ink stamp. Art Deco era pieces are signed in script. Common pieces: $30–$150. Hudson line hand-painted pieces: $200–$2,000. Rare Sicard lustre ware: $500–$5,000.

Rookwood Pottery (1880–1967)

Cincinnati, Ohio. Uses a distinctive reverse RP monogram with flames — the number of flames indicates the year (one flame for each year after 1886). This dating system makes Rookwood easy to date precisely. Standard glaze pieces: $200–$1,000. Rare Vellum and Iris glaze: $1,000–$10,000+.

Grueby Pottery (1894–1920)

Boston. Impressed circular mark reading “GRUEBY POTTERY BOSTON USA” or “GRUEBY FAIENCE CO.” Known for distinctive matte green glaze. Common tiles: $100–$500. Vases with applied leaves: $2,000–$20,000.

Valuable European Pottery Marks

Meissen (1710–present)

The oldest European porcelain manufacturer. Identified by crossed blue swords painted under the glaze. Mark style dates the piece precisely. Common figurines: $200–$1,000. 18th-century pieces: $1,000–$50,000+.

Royal Doulton (1815–present)

English pottery with various marks over its history. Look for the lion and crown mark. Character jugs are the most collected: $20–$500 for common, $500–$5,000 for rare.

Wedgwood (1759–present)

Impressed “WEDGWOOD” in capital letters (note: “WEDGEWOOD” with an E is a different, less valuable company). Jasperware is the most recognized: $50–$500. Early Fairyland Lustre: $1,000–$10,000.

Sevres (1756–present)

French royal porcelain. Marked with intertwined Ls (royal cipher) with a date letter. 18th-century Sevres is museum-quality and extremely valuable: $5,000–$100,000+.

Dating Pottery by Marks

• “Made in [Country]”: Required on US imports after 1891. If present, the piece was made after 1891.
• “Japan” vs. “Made in Japan” vs. “Nippon”: “Nippon” was used 1891–1921. “Japan” or “Made in Japan” after 1921. “Made in Occupied Japan” 1947–1952.
• Registration numbers (British): Diamond-shaped registration marks were used 1842–1883. Consecutive “Rd No” numbers after 1884.
• No mark at all: Could indicate a very early piece (pre-1800s) or a studio/folk piece. Not necessarily less valuable.

How to Research Unknown Marks

• Photograph the mark clearly. Use your phone’s macro mode. Good lighting and a clean surface are essential.
• Check online databases: Kovels.com, Replacements.com, and the Marks4Ceramics app have extensive mark databases.
• Reference books: “Kovels’ New Dictionary of Marks” and “Miller’s Antiques Marks” are the standard references.
• Use AI tools: Upload a photo of the mark to our AI valuation tool for instant identification and pricing.

Found pottery with marks? Upload a photo to our free AI valuation tool and get an instant estimate with maker identification.