There are many theories as to why no publicly known aircraft has been designated F-19.

The three aircraft were designated the YT-35 by the air force.

But this aircraft wasn't designated as a troop carrier.

Therefore, more than one aircraft may be designated by the same code.

The other three aircraft didn't have this equipment installed, and were designated E3A.

The first aircraft constructed was designated as a Prue 215.

The aircraft was designated the Commander 700 for the North American market.

Soon he had been detected by several other stations, and the aircraft was designated as "Raid 42".

Note: during the war, all these aircraft were designated Ca.4 by the Italian Army.

With some further tail modifications the new aircraft was designated as A 35.