Marking:  Leopard's head crowned (London assay office mark);
 w (date letter for 1690–91);
 Lion passant (English quality mark for sterling);
 G.M., crescent below (maker's mark)
Location of marks:
On each piece, on side near rim; mark  not clearly struck; only part of maker's mark visible on each.
Joseph M. and Aimee Loeb May (until 1963; to MMA)