The 100-ton gun was a 17.72-inch (450 mm) rifled muzzle-loading (RML) gun made by Elswick Ordnance Company, the armaments division of the British manufacturing company Armstrong Whitworth, owned by William Armstrong. The 15 guns Armstrong made were used to arm two Italian battleships and, to counter these, British fortifications at Malta and Gibraltar.
"Rockbuster" at Napier of Magdala Battery, Gibraltar
Twin guns on Duilio
Rinella gun, Malta, still on the original mount
Twin turret, Duilio
Sir W G Armstrong Whitworth & Co Ltd was a major British manufacturing company of the early years of the 20th century. With headquarters in Elswick, Newcastle upon Tyne, Armstrong Whitworth built armaments, ships, locomotives, automobiles and aircraft.
Armstrong Whitworth
Metropolitan Railway K Class 2-6-4T locomotive
Works plate on Armstrong Whitworth-built LMS Stanier Class 5 4-6-0 45305 showing completion in 1936
Brazil Navy ship Bahia