History
In the mid-1930s, Italy began design studies for a new naval antiaircraft gun to replace the 100mm/40 mounts, which was too slow to elevate and track modern aircraft. After calibres from 6-127 mm were evaluated, Regia Marina opted for a compromise between firepower, rate of fire, and system weight. Ansaldo did the initial design work and developed the 90mm/50 Ansaldo 1938, OTO 1939 model heavy antiaircraft gun and stabilized mount. Performance was similar to the famed German 88mm, and these guns remained in service for many years after WW2. These guns were installed in the Littori class battleships and the reconstructed battleships Andrea Dorea and Duilio. Plans for fitting out other ships were never carried out. Although the guns were satisfactory, the stabilization system was prone to breakdowns and the ammunition had limitations.
The Parts