Just a wee bit about the turret, it was a Caproni Lanciani Delta Type E turret, or Toretto dorsale Tipo E, which the gun was manually elevated, but rotation in azimuth might have (I've seen different versions of this in that it might have been powered in azimuth, but also that it was completely manual in operation) been powered, like the Breda V turret, which had an electric motor driving the turret in azimuth. The balancing arm assisted in rotation as the slipstream acting on the gun tended to provide resistance to its rotation, so a counter arm was placed directionally opposite to the gun barrel to provide a wind vane operating in the opposite sense to the airflow direction, being connected to the gun mechanism to match its elevation. The gun was either a 12.7 mm (50 cal) Scotti or Breda-SAFAT MG.
Correction, the turret was manually rotated and was not power assisted.