A Parrott Rifle as developed by Captain Robert Parker Parrott in 1860. The weapon was used extensively during the American Civil War by both the Union and the Confederates.
This type of cannon was mounted both on land and onboard ships.
Wooden parts, the Gun barrel and the brass items are all UV mapped, some overlapping. The native .blend file contains materials for rendering in the Cycles render engine. Textures are supplied in a zip file called 'SE_Parrott_Rifle_Textures.zip'. Textures are supplied as mostly PNG files, except for the displacement map for the cannon barrel which is a tiff file. Textures range from 3000 x 2075 down to 256 x 256 pixels.
You may have to re-establish links to the textures in the 3D application of your choice.