Perspective drawing apparatus, incomplete, in integral mahogany case
1760-1770
1760-1770
2000-100 BCE
1769
1761
1761
1762
1762
1762
1762
1762
1762
1764
1762
1762
1770
1762
1762
1990-96
1770
1771
1761
1772 (original); 1919 (model)
1769
1761
1705-1737
1762
1761
1763
1761-1762
1761
1762
1761
1765
1762
1761
4000-2001 BCE
1761
1760-1772
1760
1888-185
1772
1771
1767
1765
1972-3
1945-50
1990-95
1761
1760
1763