Spanish submarine G-7 was originally U-573, a Type VIIC submarine of the German Kriegsmarine.
On May 2, 1942, U-573 limped into Cartagena harbor, badly damaged after an air attack. Realizing that repair was impractical, the Kriegsmarine sold the boat to Spain for 1.5 million Reichsmark. The Spanish Navy was obviously interested on the submarine as at the time was trying to locally produce 6 Type VIIC-class submarines, designated G Class, being unable to achieve this objective due to technical reasons. On August 2, at 10am, she was commissioned into the Armada Española as G-7.
G-7's repairs were completed in 1947, and she served the Spanish Navy until 1970. Renamed S-01, she was decommissioned, auctioned for 3,334,751 Pts (about $26,500), after which, despite efforts to save and preserve her as a museum, the submarine was broken up for scrap.