Sample of gutta percha insulated cable, 1863-7
1863-7
1863-7
1855
2000-100 BCE
1854
1856
1893-4
1855
1934
1854
1851
1851
1853
1853
1852
circa 1854
circa 1854
1855
1851
1955; 1830
1854
1772 (original); 1919 (model)
1801-1840 (original); 1901 (model)
1775-1799 (original); 1900-1907 (model)
1851
1855
1852
1930 (replica); 1834 (original)
1855
1986 (replica); 1501-1600 (original)
1934
1851
1705-1737
1870-1877
1856
1855
1855
circa 1854
1856
1851
1830 (original); 1967 (model)
1851
1855
1990-96
1853
4000-2001 BCE
1888-185
1851
1860-1820
1852
1871-1830