John Mason (1775-1843) was a gunmaker in Shrewsbury, Massachusetts. The smoothbore barrel has small blade and notch sights, "J. MASON" marked ahead of the rear sight on the long sighting flat which has an interrupted section in the breech section featuring scroll and floral engraving, 9 inch side flats, and a hooked breech plug which fits into the dished and floral engraved standing breech. The lock is marked "T/KETLAND/& Co." The furniture is brass and features very nice floral engraving. The stock also has very nice molding, silver wire inlaid designs at the ramrod entry pipe barrel tang, and front of the comb; engraved domed silver wrist escutcheon, and nicely shaped comb and butt.