Undated
WS
Source dates the illustrated hallmark 1781/82.
London
gothic into an oblong chamfered rectangle William Sumner I 1781/82 hallmark.
Marks & lettering
2 marks
Undated
W.S
Illustrated hallmark dated 1787. Mark entered 1784.
London
into a rectangle William Sumner I entered 1784 1787 hallmark.