Jacob Harder was a gunmaker active in Athens and Lock Haven, Pennsylvania, as well as just across the state line from Athens in Waverly, New York. It features a .44 caliber rifled barrel over a 24 gauge shotgun barrel. The upper barrel has a German silver blade front sight, a notch rear sight, scroll engraving, "J. HARDER/LOCK HAVEN PA" marked on the upper flat near the breech, and additional scroll engraving and a German silver band at the breech end. There are additional German silver bands and scroll engraving on the breech plug, and the locks have light scroll and border engraving. The gun features adjustable double set triggers, a ramrod fit along the left side of the barrels, and a checkered buttstock with rounded cheekpiece, German silver furniture and accent plates, and some nice figure.

Very fine with more than half of the light Damascus patterns visible on the upper barrel and a mix of fading original brown finish and smooth gray and brown patina on the barrels, dark gray and brown patina on the plugs and locks, attractive light aged patina on the German silver, and generally only light overall wear. The stock is also very fine and has crisp checkering, some minor scrapes and dings, and attractive figure. Mechanically excellent. A truly exceptional American percussion longarm!