The patent is a Wm. Haynes patent which covers the way tone holes were drawn from the body, and this patent was liscensed to Conn, who made your horn. The Conn serial number sequence does not in any way correspond to the Lyon and Healy production, and the instruments are NOT the same. What you have is an old curved soprano, not anything particularly valuable. There is very little demand for these old stencil horns.

I would like to know when it was made.