![]() After 1884, the diamond-shaped marks were replaced by the letters Rd. Mark “A” represents the mark used between 18 mark “B” represents the mark between 18. The information within the diamond changed after 1867. Here are some notes to help date any piece that bears an English registry mark.Ī diamond-shaped registry mark was used between 18. Information is available on their websites. Email: offices will research designs for a fee. Kew, Richmond, Surrey TW9 4DU, UK Intellectual property: registered designs 1839-1991 – The National Archives To obtain more detailed information, contact one of the following offices or visit their websites: For pieces registered 1839-1991: Tables listed here tell how to decode the mark to learn the type of material, month, maker, and year of manufacture. ![]() No.,” followed by the number assigned to the ceramic, was used. ![]() After 1883, the diamond shape was discontinued and “Rd. Marks registered from 1867 to 1883 have a number instead of a letter at the top of the diamond. Marks registered from 1842 to 1867 have a letter at the top of the diamond. ![]() Between 18, the diamond-shaped mark was used. The mark has the Roman numerals “IV” at the top of the mark if it is for a ceramic. It is easy to tell when the ceramic was made. The diamond-shaped English Registry mark, was used by the English patent office since 1842 to identify pieces of English pottery, porcelain, and other products.
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