I've been looking online again and I think the Centennial #2 is pretty close. I did find online instructions for that machine for winding the bobbin, but I can't get my machine to disengage as the instructions here say...
http://www.sewusa.com/Threading_Diag...ng_diagram.htm
I can't get that inner wheel to turn counter clockwise! So frustrated right now. I don't mind paying for the manual, at all. I just want to know it is going to be helpful!
Thank you all for your helpful replies so far.
As far as cleaning and oiling, I don't even know how to go about that until I find a manual.
I have sewn a tiny bit on it thus far, but I will stop until I can figure out how to do those. I certainly don't want to tear it up.