I picked up a gorgeous Singer 503A in the case this morning at an Estate Sale. I had to do a little cleaning, but overall the machine was in excellent condition.
The machine, unfortunately doesn't have any attachments and only one cam, but those are much more easily found than the carry case!
I have to say, I am quite fond of the 400 & 500 series machines. They are very smooth (thanks to being gear driven, like the 201-2) and the stitches are just gorgeous. Not to mention they have that certain mid-century flair!
This machine also has typical perfect vintage Singer stitches. I am always enamored with them while I am sewing with them. I always say they are smooth like Butter! <3