Landships Modeling has a new 3D printing file for the Holland sub 1899. It's a 'Print it Yourself' kit complete with .stl files and instructions to build the submarine 'Holland' as it was in 1899 in 1/48 scale.
This is partial text from the full article (usually with photos) at https://modelshipwrights.com/news/3d-printing-for-holland-submarine-1899