This is a 1/72 scale barrel for the short 15" Dalgren muzzle loaders c.1860s
Designed by Rear Admiral John A. Dahlgren USN, this was a 15" verion of his famous family of muzzle-loaders. These were originally designed for use in the Passiac-class Monitors. 34 were cast by the Fort Pitt Foundry between 1862 and 1864. The first XV-inch guns' barrels were so short that the muzzle was inside the monitor's turret when the gun was discharged. The resulting blast and fumes in the turret would have made the gun impossible to work. The navy constructed smoke-boxes inside the turrets of the monitors equipped with the short XV-inch gun, but the presence of the smoke-boxes slowed the rate of fire for the guns. When mounted in a turret, the crew for a XV-inch Dahlgren was 10 including powdermen. Carried on Passaic (1 XI-inch and 1 XV-inch short) and early Canonicus class monitors. 15 inch Dahlgren guns for the Russian Passaics, the Uragan class were produced at the new Aleksandrovsk gun factory in Petrozavodsk in Russian Karelia.