Strowger calling dial, 1906
1906
1906
circa 1905
1908
1906
1872 (original); 1909 (model)
1905
1955; 1830
1934
2000-100 BCE
1906
1907
1905
1705-1737
1930 (replica); 1834 (original)
1903 (original); 1982 (model)
1772 (original); 1919 (model)
1906
1990-96
1905
1907
1934
1905
1830 (original); 1967 (model)
1908
1905
1907
4000-2001 BCE
1801-1892 (prepared); 1946 (element replaced)
1905
1908
1907-1908
circa 1907
1962-05
1906
circa 1907
1905
1908
1908
1906
circa 1907
1970-1900
1908
1908
10000-5000 BCE
1910-130
1906
1906-1907
1905
1905
1908