1870–1873 | 1873–1914 | 1914–1954 | 1954–present |
1870–1873
1873–1914
1914–1954
In 1914, the circle on the middle was dropped.
1954–present
August 20, 2001
1870–1873 | 1873–1914 | 1914–1954 | 1954–present |
In 1914, the circle on the middle was dropped.
August 20, 2001