Strowger calling dial, 1906
1906
1906
1906
1872 (original); 1909 (model)
1955; 1830
1934
2000-100 BCE
1906
1907
1705-1737
1930 (replica); 1834 (original)
1903 (original); 1982 (model)
1772 (original); 1919 (model)
1906
1990-96
1907
1934
1830 (original); 1967 (model)
1907
4000-2001 BCE
1801-1892 (prepared); 1946 (element replaced)
circa 1907
1962-05
1906
circa 1907
1906
circa 1907
1970-1900
10000-5000 BCE
1910-130
1906
1906-1907
circa 1907
1713-1750
1907
circa 1906
1800-1830
1800-1830
1801-1850
1801-1825
1692-1730
1907
1907
1940-1050
1907
8500-2000 BCE
5000-500 BCE
2686-2613 BCE
2000 BCE
8500-2000 BCE
8500-2000 BCE