dayton1, if you begin by posting the long string of numbers stamped on the cooling air cowl of the Briggs engine, we can at least identify when the engine was made and a few details of its specification. (Of course it is not necessarily the original engine.) The other parts of the mower that may be distinctive are the transmission, mowing deck drive, and front suspension/steering. If you can post pictures of those parts, and post any numbers or letters stamped or moulded on the outside of the transmission, we'll see if anyone recognises them. Also look on the longitudinal frame rails in case there is an identification plate pop-riveted to it.