Originally Posted by maporch
Exciting news! My aunt has passed on my great grandmother's treadle sewing machine to me!
Minnesota B was made by Davis and sold by Sears between 1902 and 1909. (Per Charles Law's Encyclopedia of Antique Sewing Machines)
I would suspect that it uses a Davis long needle (Boye 10), but don't know for sure, and don't know if there's a modern equivalent.