An ormolu and Blue John cassolette vase circa 1770, attributed to Matthew Boulton

Good overall condition. Minor wear to gilding.
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The design for this cassolette vase conforms very closely to a drawing which survives among the papers of Matthew Boulton at the Birmingham City Library, Pattern Book 1, p.171 ( see illustration).

Matthew Boulton and his partner, John Fothergill, founded their metalwork factory in Soho near Birmingham in 1760s. The firm produced fine quality silver, Sheffield plate and ormolu ornaments and received commissions from King George III and Empress Catherine the Great of Russia amongst other notables. They frequently used Bluejohn in their ornaments. Vases accounted for he majority of the firm`s ormolu production, which also included inkstands, icepails, tripods, girnadoles and obelisks. 

A pair of similar vases are illustrated  in Nicholas Goodison, Matthew Boulton: Ormolu, London, 2002, pl.277, p.305.