Perspective drawing apparatus, incomplete, in integral mahogany case
1760-1770
1760-1770
1769
2000-100 BCE
1762
1762
1764
1770
1762
1762
1761
1761
1762
1762
1762
1762
1762
1762
1770
1990-96
1760-1772
1771
1705-1737
1765
1772 (original); 1919 (model)
4000-2001 BCE
1769
1760
1761
1762
1761
1761-1762
1763
1761
1762
1762
1761
1761
1761
1761
1769
1770
1762
1730; 1967
1761
1972-3
2500 BCE
1880-120
1767
1990-95
1772