![](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
1858
2000-100 BCE
1893-4
1934
1858
1857
1857-1858
1858
1857-1858
1858-03-02
1857-1858
1858
1955; 1830
before 1857
1772 (original); 1919 (model)
1801-1840 (original); 1901 (model)
1775-1799 (original); 1900-1907 (model)
1858
1930 (replica); 1834 (original)
1986 (replica); 1501-1600 (original)
1858
1934
1857
1705-1737
1870-1877
1858
1857
1857
1830 (original); 1967 (model)
1990-96
4000-2001 BCE
1888-185
1860-1820
1871-1830
1858
August 1858
1857-1858
1832-1850
1857
1857
1857
2000-1350
1883-01
1972-3
1857
1870-1800
1945-50
3000 BCE
1857