Shaun King Antiques has dated this piece to the Georgian era.
Drawn by John Smith, Engraved by F. Merigot and Published March 1791 by R. Blamire, Strand London.

The engraving is behind glass in a very attractive wooden frame which is decorated in five contrasting colours and may well be contemporary with the print.
Dimensions of Frame:
Height: 14.5 inches (37 cm)
Width: 19.75 inches (50.5 cm)
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Shaun King Antiques has dated this piece to the Georgian era.
Third generation antiques dealer selling a wide range of large and small antiques pre 1920.
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