Originally Posted by JoSew

I have what I think is a Minnesota D model treadle machine. I say D model because the serial number starts with a D. It belonged to my grandmother, who got it used in the late 40s or early 50s. How can I find out more about the manufacturing date and repairing the machine? I have discovered the thread and have been reading through it, but starting from the beginning it will take me a while to make it through all the posts.