![](https://coimages.sciencemuseumgroup.org.uk/260/742/large_thumbnail_b780543.jpg)
Perspective drawing apparatus, incomplete, in integral mahogany case
1760-1770
1760-1770
1750-1770
1750
1758-1769
1758-1769
1758-1769
1762
1762
circa 1750
1762
1755
1761
1762
1762
1752
1762
1762
1761
1762
1748-1763
1769
1750-1760
2000-100 BCE
1757
1762
1752
1762
1752
1755
1764
1770
1755
1750-1766
1770
1990-96
1771
1752
1752
1758-1769
1755-1765
1760-1772
1761
1761
1762
1761
1761
1761
1761
1758-1769
1705-1737