Flintlock swivel guns were commonly used on a wide variety of military and merchant vessels in the early 19th century and earlier and could be used both for fighting enemy personnel and for signaling. There were multiple Blowen gunmakers including James Blowen active c. 1757-1811 and his sons James Henry and Samuel Thomas active in the early 19th century. The bore is estimated above and flares out to just under 2 inches at the muzzle. The barrel has two unclear marks on the left at the breech. The lock is marked "BLOWEN." The sideplate is the same style used on other Royal Army and Navy weapons, and the buttplate is a solid piece of thick brass and secured by three screws.