Italian Submarine Perla

Perla was the lead ship of her class of submarines built for the Italian Regina Marina. On June 6, 1942, Perla launched two torpedoes at the British corvette HMS Hyacinth. Both missed and Hyacinth counter attacked with depth charges. Suffering serious damage, Captain Ventura ordered her to surface and be scuttled. Damage to the Kingston Valves caused by the attack meant that she flooded very slowly. This provided time for the British to board and prevent her sinking.

Repaired and commissioned into the British Royal Navy she was renamed HMS P712.

While in British service she was used to evaluate the level of development of Italian submarines.

In 1943, she was transferred to the Hellenic Navy and renamed Matrozos. She served until 1947 when she was sold and scrapped.