The draft card's date was June 5, 1917. He said he was born 14 Apr 1892.
This is probably them in the 1920 Gratiot Co. census: head, Otis B. WILSON, 28, IL IL IL, laborer-?trench factory wife, Verda, 26, IL OH OH
I don't find any male Wilson that married a Verda ca 1914 in MI but they may have married in IL. There is a Bertie/Bertis Wilson in the 1900 Fayette Co. IL census.
There is a B. Wilson, born on that date that died in Jan 1976, possibly in Gladwin, MI. Try http://www.gladwinlibrary.org/http://www.gladwinlibrary.org/ for a copy of his obit which may say something like, he married Verda somebody on date.