I've got plenty of parts for that one if you need them, but that machine is tough!  About all they ever need is a little oil . . . and maybe a new needle (they use the same needles as a modern Singer and you can buy them at Wal-Mart), a belt or a "tire" (actually just a big O ring) for the bobbin winder.  I'm not sure if I have any belts left or not.  I buy them 5 at a time, but I may need to order more, but I know I've got tires for the bobbin winder if you need one.  From what I can see of it in the picture, the base and cabinet looks like it's in great shape, but may be missing some parts for the drawers . . . I might have what you need for them too.  I've got several 27s and 127s . . . one was built in 1892 and still sews like a new machine.

It's really cool to have the original manual, but I wouldn't try to use it more than I had too.  The paper they are made of tends to get brittle after 100 or so years.  You can download a .pdf file of the manual from http://www.singerco.com