This is a collectible Harvey W Peace hand saw from the late 19th century. It is 24 inches long overall. The blade has 10 teeth per inch. The saw has a patent date of July 3, 1883. The blade is 22.25 inches long measured at the longest point. There is the # 10 etched into the Blade.   With a bit of elbow grease, this saw would make a nice addition  to any collection.   I am not familiar  with  collectible  woodworking tools but will attempt  to answer any questions. Please look it over good,  Enlarge photos please. They are your best description.