This is a K-class sub. Distinguished service between 1914 and 1923. The spray, no doubt added in the retouch department, conveniently obscures any identifying marks.
And this is the mighty Nautilus, decommissioned in 1980 to become a museum ship.
These “Defenders of America” cards came to you via boxes of shredded hay, er, wheat between 1958 and 1959.
Uncle Bob's Pix 