From 1770 to 1773, the script initial

and the anchor known as the Derby-Chelsea or the Duesbury-Chelsea mark was introduced, as William Duesbury had purchased “the Chelsea Porcelain Manufactory, and its appurtenances and lease thereof,” on February 5, 1770, and made this addition to the Chelsea anchor. This mark of the Derby-Chelsea period is usually in gold, and was used both at the factory at Chelsea and at Derby. Examples of this period are of comparative rarity, and are eagerly sought after by collectors.

The Derby-Chelsea marks are given in the “Chat” on Chelsea ([p. 39]).

The works at Chelsea were not finally discontinued till 1784, when they were destroyed by Duesbury, the kilns and every part of the factory pulled down, and what was available sent off to Derby. About the year 1773, a

and a crown were used. This mark is mostly in blue, but sometimes in puce, light red, or green. This crown was added by Royal permission, because the factory had been honoured by Royal patronage.

Will my readers note that in the earlier pieces of Derby and Crown-Derby china the crown is carefully jewelled; in the later productions of the Duesbury period the mark was rudely executed, and the crown was hastily pencilled.