Spanish bronze "thundermug" salute mortar, 1700s. 6.45 kilograms, 6-3/4" tall. Sometimes called a "thundermug," small flat-based cannons like this were used as powder-testers and signaling guns, this one with heavy brown-green patina, side lift handle, tapered body with ring-turned decoration, base with powder receptacle and vent, in excellent condition. With photo-certificate. ($500-750)