This is a tall order without more info.
For starters, there's Old ABE
that is pretty old.
UUVs haven't changed much since the early ABE era, after glass sphere's came the torpedo like design that has been used for 2 decades if not more. So a 'old-school' will swim the same as a modern, and look the same.
Are you looking for long trip mission oriented UUVs like mine hunters, or more small search pattern ROV type UUVs?
Your best bet is to dig around for anything from Woods Hole Oceanographic Institute, as they are arguably the birthplace of early UUVs (like ABE).
Otherwise I can ask around the office. Are you in the Navy's GAL? if not can you PM me your work email?