Welcome to the board! If you're wondering why we all have the same avatar, it's because we're all a bit nuts. Miriam is the Nutsest, though; she sledgehammered a dead machine onto a rock and then tried to sell it on Craigslist for $500. Despite that, though, she is one of the experts here on cleaning, fixing, and re-assembling dis-assembled assemblies.
:-)
I agree, don't take it apart yet. However you could do a heckuva great cleaning job without taking things apart! Sunflowerzz on this board is -great- at cleaning machines. She gets them cleaner than one could possibly imagine. Maybe she will have some tips for you.
By the way, its lines looks sort of early-Bernina-like.