I see a lot of listings on eBay and Craigslist for “Industrial” strength Singer model 15, 99, 66, 201,… etc. Same with Whites and Kenmores. They are not “industrial” sewing machines, they are “domestic” sewing machines. But what really is the difference?
Before you jump on purchasing a domestic sewing machine claiming it is industrial, or commercial, check out the link below:
http://vssmb.blogspot.com/2012/04/difference-between-domestic-industrial.html#more
Professionally Restored Vintage Fine Quality Sewing Machines 