If you scroll down to the bottom of the site that Steve gave you you will see a Franklin FR made by White. I have one and this is the same machine as yours. You can download a free manual at
www.ismacs.net/white/manuals/white-rotary.pdf Your Minnesota is a badged White sold by Sears. Sears added the name Minnesota. Mr Sears is originally from Minnesota so name of the machines. The manual will be a white manual but will be same machine.