AeroJet was an early American rocket manufacturer that diversified into various other military projects in the 1950s. This submarine might not look at all like the JATO (Jet Assisted Take Off) units that AeroJet sold, but the contacts and ability to sell stuff to the hungry US Military complex was the same.
The above youtube video shows a similar vintage small submarine on film, and with some work this one could get back into the sea. It isn't every day that you get a chance to own (or live in) a yellow submarine.
See a better way to sail the sea of green? firstname.lastname@example.org