Seeing all the old machines made me look for the pictures of my machine which was given to me by my Grandmother. The manual says it is a Sears and Roebuck, Minnesota, Model "A". The certificate inside shows the manufacture date of January 25, 1909.
The cloth pinned around it is what she used for a pin cushion. Still has all the attachments and many of her supplies in the drawer. I have not used it since the 1950's.