English 1884 - 2009 marks Design Registry Numbers

In the years from 1842 to 1883 were used English registry diamond-shaped marks. After that, a system consisting of the letters "Rd No" followed by a number was introduced.

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Diamond-shaped English registry marks

These marks were used by the English patent office from 1842 to 1883.

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Doulton series and patterns numbers

English Translucent China Royal Doulton mark

Doulton pattern and code numbers help to determine the approximate date when the item type was first introduced.

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