The 152 mm /53 Model 1926–1929 were built for the Italian Navy in the years before World War II. These guns were used on all light cruisers except the Duca degli Abruzzi subclass.

Construction The Model 1926 was designed and manufactured by Ansaldo, while the Model 1929 was manufactured by OTO Melara. Although both models of gun were similar in construction, components from each manufacturer were not fully interchangeable.

The gun mounts had electrically powered training, elevation, hoists, rammers and the guns shared a common cradle. Improvements in ammunition handling meant that the rate of fire for the Model 1929 was nearly twice as fast as the Model 1926. Loading was at +20° for the Model 1926, while the model 1929 could be loaded at any angle up to 45°. These guns suffered from dispersion problems so the original muzzle velocity of was reduced to with AP shells. Shell weight was also reduced from to in an attempt to resolve these problems, but were only partially successful. The main reason for the dispersion problem was because the guns were mounted too close together on a common cradle, which also complicated loading of the guns.Campbell, Naval Weapons of WWII, p.331-332.

Naval service The majority of the Condottieri classes had two superfiring twin-mount turrets forward and aft, except for the Duca degli Abruzzi subclass which had different model guns and had two twin turrets replaced with two triple turrets. The carried Model 1926 guns, while the Cadorna, Montecuccoli, and Duca d'Aosta subclasses carried Model 1929 guns. The mountings for the Giussano and Cadorna subclasses were found to be too lightly built for the recoil forces created by these guns.Campbell, Naval Weapons of WWII, pp. 331-332.

Ammunition Ammunition was of quick-fire separate loading type. The AP projectile was long with a cartridge case and a bagged charge which weighed .

The gun was able to fire: Armor Piercing (early) - Armor Piercing (late) - High Explosive -

Photo gallery Surviving examples of Model 1929 guns salvaged from the cruiser are located at the theme and amusement park near Perugia, Italy.

See also Weapons of comparable role, performance and era BL 6-inch Mk XXII naval gun approximate British equivalent deployed on battleships 6-inch/53-caliber gun US equivalent

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