I used to own a 130 with all the original accessories and manual. Just sold it last year. It's from the early 50's and it was their first home machine, but the parts were based on and in fact included some of the industrial parts and is often called a semi industrial. Your machine originally had the small motor, but since it's on the outside, it's capable of being attached to an industrial motor and set up on an industrial table. It's still, however, a semi industrial, but it's pretty powerful and whatever you can fit under the foot, it can sew. It's faster than a home machine and makes a gorgeous stitch, but it's limited to the thickness it can take because of the short shank. It's a very good machine but keep in mind it's not a true industrial. It's a zigzag with the ability to make other decorative stitches. Acessories for this are often listed on Ebay, so just keep an eye out. You can get a manual at a number of places and I'll list a few.

http://www.ucanprint.com/

http://www.sewusa.com/

http://www.sewing-machine-manuals.com/

I am looking for info on this machine. I have a chance to pick it up for $150.00 and need a machine to sew double 8oz leather.