1750-1770
1785
1755
1757
1776
1770
hallmarked 1788
1750-1766
1776-1780
1785-1790
1758-1769
1758-1773
1783
1742
1752
1762
1769
1764
1778
1784
1782
1738-1777
1750
1750-1760
1781-1790
1745-1755
1735-1754.
1740-1753
1735-1753
1735-1752
1748-1763
1785-1789
circa 1750