 A mass-produced version of the LKA was designed by a collaborative team from Daimler-Benz, Henschel, Krupp, MAN, and Rheinmetall, exchanging the casemate for a rotating turret. This version was accepted into service after testing in 1934. Although these tanks were referred to as the La S and LKA well beyond the start of production, its official designation, assigned in 1938, was Panzerkampfwagen I Ausführung. A ('model A' or, more accurately, 'batch A'). The first 15 tanks, produced between February and March 1934, did not include the rotating turret and were used for crew training. Following these, production was switched to the combat version of the tank. The Ausf. A was under-armored, with steel plate of only 13 millimeters (0.51 in) at its thickest. The tank had several design flaws, including suspension problems, which made the vehicle pitch at high velocities, and engine overheating. The driver was positioned inside the chassis and used conventional steering levers to control the tank, while the commander was positioned in the turret where he also acted as gunner. The two crewmen could communicate by means of a voice tube. Machine gun ammunition was stowed in five bins, containing various numbers of 25-round magazines. Author Lucas Molina Franco suggests that 833 Panzerkampfwagen I Ausf. A tanks were built in total, while authors Bryan Perrett offers the number of 300 and Terry Gander 818 units.
