Caproni Ca.135
Designed in 1934 to an Italian medium bomber requirement, the prototype Ca.135 first flew in April 1935.
In 1936 Italy ordered 14 aircraft as the "Spanish type", but they were never used in the Spanish Civil War. Initially sent to bomber squadrons, the aircraft were found to be underpowered and were rapidly demoted instead to flying schools. Attempts were made to change the engines for more powerful radial engines, and this eventually led to the larger, more powerful Ca.135bis model. With their preference for 3-engined bombers this improved type didn't see Italian service, but instead became an export model for Hungary.
In 1936 Peru ordered a modified version of the Ca.135 as the "Peruvian type", with a differing very "un-Italian" defensive turret arangement, including a retractible dust-bin turret. The aircraft were used successfully against Ecuador in the war of 1941, but by 1942 appear to have disappeared. Rumor is that the US made their destruction a condition of lend-lease military assistance to Peru.