J. Poncione was working at 281, High Holborn, London, in the early part of the 19th century. The cornice, of architectural form centered by a brass urn finial, is above a silvered register plate; engraved J. Poncionie, with scale measurements, adjustable pointer and side thermometer, all enclosed within a hinged shaped mahogany glazed inlaid door with brass side catch.
The case, with the mercurial tube showing, is veneered in mahogany in a feathered pattern, with the finely moulded borders also inlaid in a feathered design of holly and sycamore, similar to items found in Tunbridge Ware pieces. The bulbous turned removable cistern cover, has a centered roundel. The whole is in working order and is of a good colour and retaining a patination.
English Circa 1830