We don't need no steenking watches. Is that a Glen Plaid (Glenurquhart check) pattern on the jacket? That's hard to find now. It's also nifty, tuff and bitchen {insert your own adjective here}.
Zappa also had a short-lived advertising company named Nifty, Tough and Bitchen. Here's an old Hagstrom guitar ad from said company.
http://www.vintageguitarandbass.com/graphics/hagstromfrankzappaH12.jpgEDIT: I can verify, this is legit. Because I'm a musician, and I saw it a magazine (it's gotta be true). A 12-string Hag?
Those bent over quickly, not enough truss rod.