
Sample of gutta percha insulated cable, 1863-7
1863-7
1863-7
1851
1852
1849
1833
1836
1855
1842
1838
1854
1850-1856
1893-4
2000-100 BCE
1851
1853
1842
1857
1841
1850-1857
1839
1840-1845
1837
1845-1851
1846
1857-1858
1857-1858
1858-03-02
1857-1858
1834
1834
1834
1955; 1830
1852
1845-1859
1840
1855
1845-1855
circa 1850s
1839
1846
1934
circa 1850
circa 1848
1846
1854
circa 1840
1833
1856
1845
1835