I believe the following photo is of Derk Jacobs Kruizenga (1879-1952).  The uniform being worn is from World War 1.  As far as I know, Derk never served in an official capacity.  He was not a veteran.  However, Derk did sign his draft papers near the end of the war.  Was he drafted and given his uniforms right before the war ended?  At the war's commencement, Derk would have been 35 years of age.