This rare sewing machine is marked AM.H.S.M. Co. Pat Oct 21, 1884 made by the American Hand Sewing Machine Company in Bridgeport, Ct. was also known as an American Hand scissors-style sewing Antique American Hand Sewing Machine machine. Measures 8″ long and 3″ wide at the widest part.

(copied online from) A History of the Old Town of Stratford and the City of Bridgeport.

Not sure How it works or if it is complete. Looks like iy would work.