Here's the link to Sears Sewing Machines on Ismac's and written by Charles Law:
http://www.ismacs.net/sears/sears.html
According to this Goodrich, Davis, Domestic, White, and Standard all made Minnesota's. The Min. L was made by Standard and is a "Class N" or Norwood. There's a handy dandy little book sold on ebay for $10 where I got this info from: "The Handbook of Antique Sewing Machines" by Charles Law. $10 well spent and I'm not the seller.
Jon
Originally Posted by
marylehman
Hi, I just found this site looking for info on my Minnesota L which is in a lovely box cabinet. I bought it several years ago but husband is today cleaning it up for use. It is lovely, works well. Think it was made in 1912. So nice to find a site like this. I have another old treadle, a White and almost perfect condition. Plus a variety of Singers, including my work horse, 401A.