Developed by Caproni Bergamaschi, the company's Bergamo branch, the Ca.310 was a light bomber and reconnaissance aircraft first flown on 20 February 1937. Large numbers of Ca.310, Ca.311, Ca.312, Ca.313 and Ca.314 models were ordered as combat, maritime patrol or training aircraft by Italy, Hungary, Yugoslavia, Belgium, Norway, Sweden, Peru, and even France, Britain and Germany. Due to world events, many of the orders were not fulfilled, while the planes were strongly disliked in Hungarian, Norwegian and Swedish service. Serial MM20809 confirmed beyond doubt by another photo. Ca.134 MM330 is on the left. 'Dux' is the Latin form of Duce. Photo from: Fondazione Fiera Milano