The frontal armor of the turret was thick, its sides were protected by armor and it had a roof thick. The guns in the turret had a maximum elevation of +20°. The turret could revolve 360°, which allowed it to provide fire support for the Italian forces within range during the Second Battle of the Piave River in June 1918. Two other twin-gun turrets were installed near Brindisi: Batteries "Benedetto Brin" and "Fratelli Bandiera". Construction of both began in 1916, but only the former was completed during the war, test-firing its Armstrong-Pozzuoli guns in September 1917. The latter was originally planned to be equipped with guns, but it was modified to suit a pair of Armstrong-Pozzuoli guns in 1917; construction was suspended later that year, before it was finally completed in 1923. These bunkers were almost identical to "Amalfi", except that they were entirely self-contained. Although three other twin-gun turrets were planned during the 1930s, only one ("Batteria Capo S. Panagia") north of Augusta, Sicily, was actually built, completed in 1934 with Armstrong-Pozzuoli guns. This turret was different than the earlier ones as its ammunition was loaded through doors in the rear of the turret, rather than the naval-type hoists previous used. Its gun could elevate to +30°. After the and the British bombardment of Genoa in early 1941, two turrets were built near the port: "Batteria Monte Moro" in Quinto al Mare-Genoa and "Batteria Punta S. Martino" in Arenzano-Genoa. Both were completed in mid-1942 and they were the same type as the turret installed in Sicily. After Operation Husky, the Allied invasion of Sicily in mid-1943, "Batteria Capo S. Panagia" was demolished by its garrison before they surrendered. The two batteries at Brindisi never fired their guns in anger and were captured by the Allies in good condition. The two Genoese batteries and "Batteria Amalfi" were captured by the Germans after the Italian armistice in September 1943, being operated by them and the forces of the puppet (Italian Social Republic) for the rest of the war. "Batteria Monte Moro" was besieged by partisans for several days before surrendering to the American 92nd Infantry Division on 29 April 1945 while "Batteria Punta S. Martino" was damaged by the Germans before the end of the war.