Reason slot meter, c.1920.
1918-1922
1918-1922
1915
1918
1920
1917
1916
1915
1915-1917
1919
1915
1921
1934
1915
1920
1918
1915
1917
1915
circa 1920
2000-100 BCE
1917-1918
circa 1920
1922
1955; 1830
1918-1920
1918
1918
1915-1918
1916-1917
1921
1920
1920
1990-96
1920
1920
1930 (replica); 1834 (original)
1915
1916-1918
1915-1920
circa 1920
1922
1934
1920-1922
1921
circa 1917
1918
1839 (original); circa 1988 (replica)
1801-1892 (prepared); 1946 (element replaced)
circa 1919
1917