It has a 1.25 inch bore. Two bold makers marks appear on the gun. The two side by side barrels are 22.75 inches long. The third barrel is 11 inches long. Each barrel has it's own touch hole.
Small dolphins appear on top of the small barrel.
The entire gun was cast as one piece. The yoke appears to possibly be a replacement from another gun of the same time period, hence we are pricing this much lower than its true value. It has a nice deep green patina. The hammer is spring loaded. Unique and rare, early USA, cast iron black powder cannon.