Button-Hole Cutter, U. S. Patent 222,080, November 25, 1879, Moses L. Sanborn and Gideon M. Sanborn, Denmark, Maine.
The invention is a button-hole cutter operated by a treadle and with gauges to determine the spacing between holes.
This model is 12" x 6" x 10" and is made of black painted metal with fancy gold colored detail work. It is in excellent condition with two original Patent Office tags.
The model appears to be a commercial product.