Reason slot meter, c.1920.
1918-1922
1918-1922
1919
1918
1921
1934
1918
circa 1920
2000-100 BCE
circa 1920
1920
1922
1955; 1830
1918-1920
1918
1921
1918
1920
circa 1920
1920
1990-96
1920
circa 1920
1934
1921
1919
1918
1930 (replica); 1834 (original)
1801-1892 (prepared); 1946 (element replaced)
1920
1920-1922
circa 1919
1922
1922
1920
1903 (original); 1982 (model)
1772 (original); 1919 (model)
1830 (original); 1967 (model)
4000-2001 BCE
1918-1920
1919
1918
1950-1920
1971-1900
1918
1920
1920
1919
circa 1920
circa 1920
1920