horological rubber
1850-1900
1850-1900
circa 1969
1950-1960
1700-1800
circa 1880
1900
circa 1800
1835
1668-1672 Probable
1850-1900
2010
1950-1960
1750-1770
1700-1800
1850-1900
1850-1900
1850-1900
1850-1900
1850-1900
1850-1900
1863-1865
1870-1900
Unknown
1771
1850-1860
1704-1728
1717
1833-1880
circa 1860
circa 1800
circa 1795
Unknown
circa 1808
1804-1807
1700-1800
1926
1650-1700
1879
1850-1900
1850-1900
1850-1900
circa 1842