Reason slot meter, c.1920.
1918-1922
1918-1922
1918
1920
circa 1920
1922
1921
2000-100 BCE
1934
circa 1920
1920
1955; 1830
1918-1920
1921
1918
1918
1918
1919
circa 1920
1920
1920
1990-96
1920
1920
1930 (replica); 1834 (original)
1801-1892 (prepared); 1946 (element replaced)
1919
circa 1919
1934
1918
1920-1922
1921
1772 (original); 1919 (model)
circa 1920
4000-2001 BCE
1918-1920
1922
1922
1903 (original); 1982 (model)
1830 (original); 1967 (model)
1839 (original); circa 1988 (replica)
1919
1919
1922
14 May 1921
circa 1921
circa 1918
1920
1942-09
1942-07
1942-07