![](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
1842
2000-100 BCE
1893-4
1955; 1830
1934
1842
circa 1842
1705-1737
1772 (original); 1919 (model)
1801-1840 (original); 1901 (model)
1775-1799 (original); 1900-1907 (model)
1842
1930 (replica); 1834 (original)
1986 (replica); 1501-1600 (original)
1870-1877
1842
4000-2001 BCE
1830 (original); 1967 (model)
1990-96
1888-185
1890-1810
1860-1820
1842
1878-1839
1871-1830
1860-1715
1991-1783 BCE
1842
2000-1350
1883-01
1972-3
1870-1800
1945-50
3000 BCE
1990-95
1864-05
1774; 1923
1865-05
1864-10
1867-04
1864-04
1867-04
1842
1825; 1910
1870-10
30 CE
30 CE
1795-1805
1610; 1923