The German Type 212 class, also Italian Todaro class, is a highly advanced design of non-nuclear submarine (U-boat) developed by Howaldtswerke-Deutsche Werft AG (HDW) and Fincantieri S.p.a. for the German and Italian Navy.
There is also a new version available which has much more fine details worked on and it also actually dives :). it has rubber band power and adjustable diving planes.
If you like this model please support me by buying that design. https://www.turbosquid.com/FullPreview/Index.cfm/ID/1361622
original solidworks file with complete build history which is a great learning tool also is included in the purchase.
or you can also tip me from here and ask for a download link.