Strowger calling dial, 1906
1906
1906
1908
circa 1910
1906
1909
1872 (original); 1909 (model)
1955; 1830
1910
1910
1934
2000-100 BCE
1910
1910
1906
1910
1907
1705-1737
1930 (replica); 1834 (original)
1903 (original); 1982 (model)
1772 (original); 1919 (model)
1909
1906
1909-1910
1990-96
1907
1934
1830 (original); 1967 (model)
1910
1908
1907
4000-2001 BCE
1801-1892 (prepared); 1946 (element replaced)
1908
1907-1908
circa 1907
circa 1910s
circa 1910
1962-05
1906
circa 1907
1909
1908
1908
1906
circa 1907
1970-1900
1908
1908
10000-5000 BCE
1910