Yugoslav submarine Mališan
Mališan is a CB-class midget submarine that served in the Yugoslav Navy (Serbo-Croatian: Jugoslavenska ratna mornarica; JRM) from 1953 to 1957. Laid down in 1943 by the Caproni company in Milan as CB-20, she was ordered by the Italian Regia Marina (Royal Navy) during World War II for harbour defence and anti-submarine warfare tasks, but she was incomplete at the time of the Italian surrender in September 1943.
Source: Wikipedia — Yugoslav submarine Mališan (CC BY-SA 4.0)