Sample of gutta percha insulated cable, 1863-7
1863-7
1863-7
2000-100 BCE
1893-4
1815
1815
1820
1815
1772 (original); 1919 (model)
1775-1799 (original); 1900-1907 (model)
1821
1986 (replica); 1501-1600 (original)
1815
1705-1737
1820
1821
1819
1821
1821
1990-96
4000-2001 BCE
1888-185
1818
1821
1860-1820
1819-1820
circa 1820
1819
1820
1816
1817-1820
1820
1817
1815
1819
1816-1817
1819
1815-1816
1819
1819
1815
1819
1820
1815-1819
2000-1350
1883-01
1816
1972-3
1870-1800
1945-50
3000 BCE