German submarine U-660 was a Type VIIC U-boat built for Nazi Germany's Kriegsmarine for service during World War II.
She was laid down on 15 February 1941 by Howaldtswerke, Hamburg as yard number 809, launched on 17 November 1941 and commissioned... Wikipedia
Builder: Howaldtswerke-Deutsche Werft
Launched: November 17, 1941