![](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
1813
1893-4
1809
1807
1808
1815
1807
1815
1815
1808
1812
1811-1812
1772 (original); 1919 (model)
1775-1799 (original); 1900-1907 (model)
1986 (replica); 1501-1600 (original)
1809
1809
1815
1705-1737
circa 1808
circa 1810
1814
1990-96
1813
1808
4000-2001 BCE
1888-185
1808-1809
1807
1810
1810
1809
1812
1814
1810
1812
1816
1811
1814
1815
1808
1808
1814-1815
1810
1815-1816
1815
1808
2000-1350