Image: Re Umberto 13.5 inch gun barbette right elevation

Description: Right elevation diagram of 13.5-inch 30-calibre gun barbette of Italian Re Umberto class battleships Sicilia, Re Umberto and Sardinia.
Title: Re Umberto 13.5 inch gun barbette right elevation
Credit: Plate XXIII & Pages 509 - 510 in "Artillery and Explosives" by Sir Andrew Noble (1832 - 1915), published by John Murray, London. Downloaded from https://archive.org/details/artilleryexplosi00noblrich
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