![](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
1845
1845
2000-100 BCE
1843
1893-4
1934
1845
1843
1955; 1830
1844
1844
1772 (original); 1919 (model)
1801-1840 (original); 1901 (model)
1775-1799 (original); 1900-1907 (model)
1845
1930 (replica); 1834 (original)
1986 (replica); 1501-1600 (original)
1705-1737
1870-1877
1844
1830 (original); 1967 (model)
1990-96
1844
4000-2001 BCE
1888-185
1843
1860-1820
1871-1830
1843
circa 1843
1844-1845
1844-1845
circa 1843
1844
1843
1843
1844
1844
1844
1843
1843
1843
1843
1844
1844
1843-1844
1843
1844
1843