How to identify pottery marks and date a piece from its backstamp

Start by working out how the mark was made (impressed, printed or painted, under or over the glaze), then read the clues in its wording: a country name such as ENGLAND usually means a piece made for export after 1 March 1891, a British diamond registration mark dates the design to 1842–1883, and an “Rd No” to 1884 or later.

By the Antique ID team · Updated 2026-10-13

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Step 1: work out how the mark was made

Look at the mark in raking light and feel it with a fingertip: the method tells you as much as the words.

• Impressed or incised: pressed or cut into the soft clay before firing, so the letters sit below the surface and glaze often pools in them. Wedgwood, for example, impressed its name for centuries.
• Printed: a transfer or stamp gives identical, crisp lettering on every piece, often in a frame, wreath or crest.
• Painted: brushwork varies from piece to piece. Many continental factories painted their marks by hand, and hand-written pattern numbers are common on English tableware.

Next, decide whether the mark is under or over the glaze. An underglaze mark was applied before the glaze firing and lies beneath the glassy surface; you cannot feel its edge. An overglaze mark was added on top of the glaze and fired at a lower temperature. You can sometimes feel it, and it can wear away. Because an overglaze mark can be added long after a piece was made, it is the type most often used to fake a famous factory's mark (see Meissen marks).

Step 2: read the country of origin

Country names are among the most useful dating clues because they followed changes in law. Section 6 of the U.S. Tariff Act of 1890, the McKinley Tariff, provided that from the first day of March 1891 articles of foreign manufacture had to be marked “in legible English words” with their country of origin, and unmarked goods were not admitted for entry. European and Japanese potteries exporting to America added ENGLAND, FRANCE, GERMANY, NIPPON and similar words.

Britain had its own rule. The Merchandise Marks Act 1887 made false indications of origin an offence, which is how wording such as “Made in Germany” came into use on imported goods. See German porcelain marks and Noritake and Nippon marks for the details.

Step 3: decode British registration marks

A diamond-shaped mark means the design was registered with the Patent Office under the 1842 Ornamental Designs Act. The National Archives explains that these diamond marks were used only between 1842 and 1883. A Roman numeral at the top gives the material class (IV means ceramics, III glass, I metal), and the letters and numbers around the points code the day, month and year of registration. From 1842 to 1867 the letters sit on the left point and the numbers on the right. From 1868 to 1883 they swap sides. The year letters repeat in the same order in both series (X is 1842 and also 1868), so the side the letter is on matters.

From 1884 designs received a running number instead, shown as “Rd” or “Rd No”. The National Archives lists the ranges:

A registration date is a not-before date. Popular designs stayed in production for decades. A Royal Doulton plate in the Victoria and Albert Museum carries Rd No 549784, so the design was registered after September 1909, and the plate itself is catalogued simply as early 20th century.

Step 4: pattern, model and decorator numbers

The Potteries' general guide makes a point that is easy to miss: on ordinary tableware a hand-painted number on the base is often the real identifier, because numbers largely replaced pattern names. A Spode dessert plate in the V&A, for instance, carries the printed factory mark plus the pattern number 4964. Figures and vases may also carry model numbers, painter's marks or workmen's marks. Write every number down.

Step 5: research the whole mark

1. Record the method, color, position and exact wording. Small details, such as a crown, a dot or a change in spelling, often separate one period from another.
2. Check maker histories and museum collection databases. Records from the V&A and other museums often transcribe marks in full, with dates.
3. Make sure the mark fits the object's style, body and decoration.

Fakes and misleading marks

The most copied marks are the famous ones: Meissen's crossed swords, Nippon-era wreath marks, Sèvres and Wedgwood. Watch for overglaze marks where the original would be underglaze, marks that look too crisp or too perfect, and spellings that are almost right. Some genuine pieces were also imported with paper labels instead of fired marks, so a missing mark does not make a piece fake, and a mark alone does not make it genuine.

What a mark tells you about value

A mark identifies the maker and narrows the date. Value then depends on the maker's reputation, the model or pattern, the quality of decoration, rarity, condition (chips, cracks, restoration and wear to gilding) and current collector demand. See how to find the value of antiques for the next step.

Next steps

For a quick start, scan the piece and its base with Antique ID. It reads the mark and the object together, suggests a maker and date range, and gives an estimated value. An estimate is a starting point, not an appraisal; for insurance, sale or anything that looks important, ask a qualified ceramics specialist.

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