Finnish submarine Vesikko

Prototype of Type-II U-Boot, build in Finland, and bought by Finland in 1936
Originally called CV 707, until it was renamed as Vesikko (Eng. European Mink)



Interior is as accurate as I could make it, conning tower is not accurate at all

Interior and exterior sources
https://www.youtube.com/watch?v=tW4BhtqfV0M
https://fi.wikipedia.org/wiki/Sukellusvene_Vesikko