About .69 caliber. 30.5" two stage octagonal to round barrel. SN: NSN. Browned metal finish. Carved walnut stock has checkered sections to straight grip and forearm. Miquelet flintlock action with a brass post front sight, double sling swivels, single brass barrel band, and a button head cleaning rod. Lockplate is marked BONA.NASTR and has some simple floral scroll work. Barrel appears to have an illegible maker's mark in front of breech. Most likely Spanish.