Necchi Heavy Duty (model 9542)

Question

I just got this machine from an estate sale and have found little or no information on it. Have you heard of it or know where I can get an instruction manual for it? It is still in its original cabinet that has a metal Sears plate on it for parts and looks to have come from the 60's. I can't even find a picture that looks like it, though some are similar.Thanks for any help you can provideMesseis