Arado Ar 96T (ex. Ar 96B) Aircraft carrier trainer

[Seaplanes]

For use as aircraft carrier trainers, two Ar 96B-1 aircraft, W.Nr. 4552 and 4553, were converted to Ar 96T with catapult equipment and arrester hooks. These trainers were apparently tested at E-Stelle (See) in Travemünde from 25. August 1942. As the plans of completing the carrier "Graf Zeppelin" was abandoned, the two Arados were delivered to the Italian Air Force in the summer of 1943. One of the planes carried the Stammkennzeichen CD+OA. What was the Stammkennzeichen for the other one, and can anyone confirm any use by the Italians of these two aircraft.
Conversion of a further two Ar 96B-1's were planned, but later abandoned.