![](https://coimages.sciencemuseumgroup.org.uk/47/175/large_thumbnail_1970_0492__0001_.jpg)
Sample of gutta percha insulated cable, 1863-7
1863-7
1863-7
2000-100 BCE
1893-4
1807
1808
circa 1805
1806
1807
1808
1805
1772 (original); 1919 (model)
1775-1799 (original); 1900-1907 (model)
1986 (replica); 1501-1600 (original)
1806
1705-1737
circa 1808
1805
1804-1807
1990-96
1808
4000-2001 BCE
1804
1888-185
1803
1804
1805
1807
1804
1805
1808
1805
1805
1806
1803
1808
1805
1803
1804
1806
1808
1805
1805
2000-1350
1805-1806
1883-01
1972-3
1870-1800
1945-50
3000 BCE
1990-95