Base Layer
Overlays
-
March 16, 1914
June 19, 1915
October 17, 1916
November 10, 1916
November 24-29, 1916
December 18-23, 1916
November 18, 1918
December 12, 1918
December 14-25, 1918
February 4-8, 1919
April 9-12, 1919
April-June, 1919
June 30, 1919
January 19, 1921
January 24, 1921
February 23, 1921
August 1921
July 1923
1925
March 1931
March 10, 1933
March 1934
May 19, 1936
1937-1939
July 1940
April 21, 1941
October 22, 1941
December 7, 1941