This little medallion commemorates the 50th anniversary of Michigan Statehood? It is dated 1886. Michigan’s first constitutional convention was in 1835, which is the traditional anniversary date recognized by some Michiganders; while Michigan officially became a state on January 26, 1837. perhaps the 1886 date was taken as the average anniversary of the two.
The medallion’s obverse: “Semi Centennial MICH. 1886. The Reverse depicts the newly completed State Capitol. The medallion is looped .