What a great find! I have one nearly like it that was included in the purchase of a large garage/shop and property we bought about 4 years ago. I had it serviced and it sews better than any other machine I own. Mine has a box-like mechanism on the top that can do some embroidery stitches - seems to be very rare. A previous owner must have been a heavy smoker and I couldn't get all the nasty yellow smoke stains out, so I painted it white and updated the drawer knobs (old knobs were partly plastic and broken). This machine is my first choice when I sew. I also got all the attachments, manual and several boxes of notions and sewing tools with it. The seller of the property was so excited that I was a seamstress, he just started adding all of his deceased mother's sewing items to the sale - no extra cost.
As a "p.s." - we are building a house on the property this Summer and about half of the basement will be my new sewing space. It will be a dream come true.