Model of an 80-Pounder Shell Pivot Gun on a Ship Deck

Model of an 80-pound mortar on a turning sled, painted black, on a baseboard representing the quarterdeck of a paddle steamer. The wooden barrel is 55 cm long, has a caliber of 44 mm, and fittings for a sight at the muzzle and at the trunnion band; touchhole with lock elevation, cascabel as trunnion ring. The upper sled, slightly narrower towards the front, has two cheeks with three steps, the upper parts of which are made of solid brass with the trunnion blocks. The cheeks are connected by a sloping trunnion, a crossbeam in the middle, and the axle boxes; the sole plate lies on the crossbeam and the rear axle box. The axle boxes have no wheels, but slide over the runners of the lower sled, which are lined with brass. Small wheels are attached to the front of the cheeks, on which the upper sled only rests when the jack with wheels at the back is raised.