English: A cast iron sphere with a diameter of 160mm (6 inches). a weight for the sphere was unfortunately unobtainable at the time of recording, but has nevertheless been estimated by using prior experience of cannonballs (see record NARC-31BC85). The sphere has several areas of damage, rusting and denting. This object has been recorded as a probable cannonball due to its approximate weight and diameter, which match the calibre of 18th century cannons, notably saker cannons. However, it should be noted that large iron spheres were also used in milling machines of the industrial period, and so without definate context within an area known military activity this must remain as a possibility.