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1847 to 1970: the company was owned outright by the Copeland family and a variation on Copeland or W. Copeland was used; again often in conjunction with the Spode name. In 1970, to celebrate the supposed bicentenary of the founding of the company, the name reverted to Spode with a new logo designed by John Sutherland Hawes.This is the name used until the closure of the factory in 2009.The Worcester Royal Porcelain Co Ltd was formed in 1862.
These are usually on flat pieces, for example on a saucer but not on a cup.From 1870 to 1963 impressed datemarks were used - on earthenware from 1870 until 1957 and on bone china and fine stone from 1870 until 1963.These take the form of a letter over two numbers, for example J over 33, which would give you a date of January 1933.Using the Spode archive and published books you can learn about the many different backstamps (marks) on Spode pieces.This though can only be a guide to a date - it is not an exact science and some backstamps were used for many, many years.
The standard printed factory mark, included the number 51 in the centre that refers to the year 1751 when the Worcester Porcelain Company was founded by Dr John Wall.