a muzzle velocity of . The ships were also equipped with eight torpedo tubes placed in two quadruple launchers mounted on their stern. As built, the ships' anti-aircraft battery consisted of three 8.8 cm SK L/45 anti-aircraft guns in single mounts. These were replaced in 1935 with six 8.8 cm SK C/31 guns in twin mounts. Admiral Graf Spee and Deutschland were rearmed in 1938 and 1940, respectively, with six 10.5 cm L/65 guns, four 3.7 cm SK C/30 guns and initially ten 2 cm Flak guns—the number of 2 cm guns on Deutschland was eventually increased to 28. Admiral Scheer had been rearmed by 1945 with six guns, eight 3.7 cm guns, and thirty-three 2 cm guns. Armor The ships' main armored belt was thick amidships and reduced to on either end of the central citadel. The bow and stern were unarmored at the waterline. This belt was inclined to increase its protective qualities and supplemented by a longitudinal splinter bulkhead. The upper edge of the belt on Deutschland and Admiral Scheer was at the level of the armored deck. On Admiral Graf Spee, it was extended one deck higher. Deutschlands underwater protection consisted of a thick torpedo bulkhead; Admiral Scheers and Admiral Graf Spees bulkheads were reduced to . Deutschland had a thick upper deck and a main armored deck that ranged in thickness from 18–40 mm. Admiral Scheer and Admiral Graf Spee had main decks and armored decks that ranged in thickness from 17–45 mm. The armored deck in Deutschland and Admiral Scheer did not extend over the entire width of the ship due to weight; this matter was rectified in Admiral Graf Spee. Likewise, the torpedo bulkheads for Deutschland and Admiral Scheer stopped at the inside of the double-bottom but in Admiral Graf Spee extended to the outer hull. The ships' forward conning tower had thick sides with a thick roof, while the aft conning tower was less well protected, with 50 mm thick sides and a thick roof. The main battery turrets had thick faces and thick sides. Their roofs ranged in thickness from . The 15 cm guns were armored with gun shields for splinter protection. Admiral Scheer and Admiral Graf Spee had some improvements in armor thickness. The barbettes, 100 mm thick in Deutschland, became 125 mm for the two sisters. Admiral Scheer had the belt somewhat improved, and Admiral Graf Spee had