
Pair of bar magnets in box
1750-1795
1750-1795
1762
1762
1761
1762
1762
1761
1762
1762
1762
1762
1762
1781-1790
1790
1733-1795
1765
1761
1775-1795
1761
1761
1762
1762
1762
1763
1761
1761
1761
1761
1761-1762
1746
1780
1762
1761
1762
1762
1725-1795
1775-1800
1762
1790-1795
1762
1734-1795
1756-1760
circa 1760
1745-1753
1761
1762
1762
1787-1800
1761