1964 Auguste Piccard mesoscaphe, billed as the world's first passenger submarine.
Fullsize image: https://diqn32j8nouaz.cloudfront.net...e_fullsize.jpg
https://diqn32j8nouaz.cloudfront.net..._submarine.jpg
More: https://en.wikipedia.org/wiki/Auguste_Piccard_(PX-8)
Previously:
https://www.homemadetools.net/forum/...892#post148665
https://www.homemadetools.net/forum/...626#post147532
https://www.homemadetools.net/forum/...483#post147060
https://www.homemadetools.net/forum/...207#post145883
https://www.homemadetools.net/forum/...209#post130545
https://www.homemadetools.net/forum/...2209#post75951
https://www.homemadetools.net/forum/...4385#post79850
