Naphtali Hart & Duncan Urquhart, London silversmiths, in partnership 1791-1811. According to Grimwade their principle output, apart from buckles, seems to have been tea services of standard design.

Naphtali Hart, no record of apprenticeship or freedom. 1st mark entered as bucklemaker in partnership with Duncan Urquhart 1791, address Clerkenwell Green. 2nd mark 1795, 3rd (2 sizes) 1802. 4th as plateworkers 1805, New Christopher St, Finsbury Square. 5th alone in 1812, King St, Finsbury Square. Hart continued to work alone until 1816 when the title became Hart & Harvey with his brother in law Henry Harvey. Hart was joined by his son John in 1828 as Naphtali Hart & Son and they entered a mark as watchmakers in 1833. Naphtali died in 1834 and John continued in business latterly described as wholesaler and retail clock and chronometer manufacturers and silversmith. Died 1858.

Duncan Urquhart, London silversmith, no record of apprenticeship or freedom. 1st mark entered as bucklemaker with Naphtali Hart 1791. 2nd mark 1795, 3rd (2 sizes) 1802, 4th marks as plateworkers (2 sizes) 1805.