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 side plate 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.
Very good. The lock has been reconverted using both antique and modern parts, and the swivel mount is likely a modern handmade replacement. The barrel and cock have light gray and brown patina and mild pitting. The lock plate has light gray patina and buff marks. The swivel mount is dark brown. The brass has aged patina. The stock has minor cracks at the tail of the lock and rear lock screw and mild scratches and dents. Mechanically fine.