12 bore, 36″ damacus barrel and marked so on the underside.   Patent breech with an extra breechblock in the case.   Engraved percussion lock marked  “S NOCK”.   Walnut half stock with cheekpiece and steel buttplate.   Engraved iron mounts overall.  In very fine original condition with the barrel showing most of the brown finish and pattern.  Excellent lock.  Bright bore.  In it’s original baize lined walnut box.