Pre-owned antique ephemera. This is matted to a piece of an antique memory book page. See photos for signs of wear such as edge and corner wear, tanning, and discolorations. 

This was taken from a memory book spanning from 1908 to about 1916. The book was like a scrapbook and belonged to a Dorothy Gilman of Minneapolis, MN. The back side of this page that the invitation is matted to has an interesting article clipping about a doctor that drove recklessly.