Pair of bar magnets in box
1750-1795
1750-1795
1776
1794
1795-1805 (original)
circa 1805
circa 1750
1771-1800
1758-1769
1758-1769
1760-1770
1758-1769
1797-1804
1785
circa 1800
1776-1780
1776-1780
1776-1780
1751-1800
1793-1803
1778
1785
1785
1806
1748-1763
1769
2000-100 BCE
1782-1793
1795-1805
1757
1784
1762
1752
1893-4
1762
1799-1802
1755
1750
1770-1800
1751-1800
1778
1777-1785
1782
1787
1764
hallmarked 1788
1756-1800
1770
1799
1802
1750-1766