Reason slot meter, c.1920.
1918-1922
1918-1922
1915
1918
1920
1917
1924
1925
1916
1925
1915
1915-1917
1924
1919
1915
1921
1934
1915
1923
1920
1918
1915
1920-1925
1917
1915
1922-1923
1922-1923
1922-1923
1922-1923
circa 1920
1915-1925
1921
1920-1925
2000-100 BCE
1917-1918
1924
1923
1925
circa 1920
1922
1955; 1830
1918-1920
1918
1918
1915-1918
1916-1917
1923
1915-1925
1920
1920
1990-96