A CAST IRON SWIVEL/BOAT/SIGNAL GUN AND WOOD CARRIAGE, likely American, late 19th century. The heavy barrel with 1 3/8 in. bore, center line mounted trunnions and heavy cascabel, mounted on a pine carriage with large cast iron front wheels and single cast iron rear wheel, with modern rammer. Barrel lg. 20, overall lg. 32 in. For further information on this lot please visit Bonhams.com For further information about this lot please visit the lot listing