I would like to know how old is this machine?

A great many old kenmore machines were badged White machines. You may find that helpful in searching for belts

search -- threading of old singer sewing machine

older machines usually threaded in the same fashion regardless of the make so that diagram will give you an idea

About 33 years.

Hi
I don't know exactly how old your machine is, but I found its operating manual here
http://www.singerco.com/uploads/download/05cd53760826209952d04b99bc6962f8ea588653.pdf
and it is clearly copyright 1971. I doubt that your machine is that old and its real age will be defined by the product life assigned by Singer before it was replaced by a different model. This should give you some idea though
Cheers

How old is your machine? If, it is fairly old, my mother's old sewing machine manual might work. Most times solutions for sewing machines are pretty generic, so do a search on a Brother.com site and see if your answer is there. Also, they do not charge for their manuals, find a machine that has some of the same features that your does and see if that works. Let me know, how you make out. Good luck

Hi! I collect old Singers but don't recognize that model number....could it be a part number, possibly?

For information on old sewing machines, check out The International Sewing Machine Collector's Society webpage at http://www.ismacs.net/home.html. They also have a section devoted to Singers but you can actually call the company 1-800-4-Singer (Have the serial number of your machine ready) (or for Singer Industrials, call 1.877.738.9869). You can also email Singer at [email protected].

Let me know what you find out about your machine, ok?

Happy Sewing!

I can help you if you can email a picture, the serial number does not help I am afraid [email protected]

http://sewing.about.com/od/beginner1/ig/Sewing-Tools/Sewing-Machine-Manuals.htm

check this site out