I don't know why I haven't posted about this before.
On my small-headstock Deluxe,the wrapping belt went bad due to dry rot before it actually wore out.
My machine has a Dayton sewing machine motor. Your's probably does too.
I needed the belt because it didn't come with one. I went to a local shop that sells and services sewing machines and vacuum cleaners.
The old guy that owns it has been in that business his whole life,and said that the industry has gone towards a universal belt system,and says the big O-ring that is usually used as a drive belt pretty much only comes in one size now.
Sizewise,it will barely fit around the wrap motor lengthwise,or in my case,about fist-sized.
I have since found these round belts can be had in Wal Mart with the vacuum cleaner belts. Tommy D.