Necchi automatic BU supernova sewing machine. This is a machine, I think was made in the 50's and

Question

This is a machine, I think was made in the 50's and I don't have a manual on how to thread it or what the tension and other settings should be. The numbers that are engraved on the underside are: 35-0180453. I would order a manual, but not sure I would get the right one because the machine is so old. I would appreciate any help you can give me.Thank you,Penny [e-mail]

I have a Necchi 35 mechanical sewing machine which was just recently serviced, so in top shape. Only problem is I am unsure of how to thread it and the correct tension/setting I should have it on. I have no manual, and hence would appreciate any advice and assistance.Many thanks!