Duncan Urquhart & Napthali Hart
They were making tongs in partnership from 1791-1812 in London.
Makers mark with pellets so pre 1805
These tongs Weigh 1 1/8 ounces and are 5 1/2 inches long. They have no monogram and are plain except for a double thread decoration around the arms and bow and they have acorn bowls. They are hallmarked for 1798.
London Hallmark 1798