This mark belongs to the usefulwares factory before 1780.
Apart from basalt, the Wedgwood & Bentley mark belongs to ornamental wares only; useful wares had : Before 1800; most likely 1780-1790.
Josiah Wedgwood was born into a family of potters in 1730 and by the time he was six years old he was apprenticed.
He learned his craft well and as an adult he began experimenting with different formulas for porcelain and had made several technological advances in the process of design transfer.
His abilities got him noticed and in 1765 he made a complete set of dishes for Queen Charlotte.
His business grew rapidly with the notoriety from his claims of being the potter to the Queen.
Recently it also merged with Waterford crystal to become Waterford Wedgwood, though the marks and name on the china are still marked Wedgwood.
: The name of the factory was added during two periods.
Josiah Wedgwood’s grandfather built the Churchyard Works, a member of the Staffordshire Potteries, during the late 1600’s.
By the age of 6, Josiah Wedgwood began working as an apprentice at the Churchyard Works making pitchers, pots, bowls, and vases.
The first thing to look for is the spelling of Wedgwood.
Some cheap imitations have mistakenly stamped fakes with the word, "Wedgewood." All Wedgwood is stamped, although there have been several different stamps over the more than 250 year period.