Impulse sender (dial), 1915
1915
1915
1915
1915
1914
1934
1913
2000-100 BCE
1915
1914
1914
1955; 1830
1914
1914
1914
1915
1915
circa 1913
1913
1913
1915
1990-96
1915
1913
1934
1705-1737
1914
1903 (original); 1982 (model)
1772 (original); 1919 (model)
circa 1915
4000-2001 BCE
1930 (replica); 1834 (original)
1914
1801-1892 (prepared); 1946 (element replaced)
1830 (original); 1967 (model)
1913
1914
1913
1989-08
1914
1915
1730; 1967
1915
1972-3
pre-1914
1915
2500 BCE
circa 1914
circa 1914
1915
1970-1910