Manufactured by Nicholas Clarke of Dublin, Ireland, who was active 1787-1811. The lock is signed "CLARKE" and the part octagon barrel is signed "CLARKE DUBLIN" on the top flat and marked "N-T 2813" (registration number from North Tipperary County, Ireland) ahead of the transition to round. The bore measured approximately .71 caliber and flares to 1 1/2 inches at the belled muzzle. The lock is iron and the mounts are brass.