I have a Durkopp and not sure if it reads 231-02 or 237-02. I can't seem to find an ounce of information about this industrial machine. It seems nice some of the time and came with a roller foot. I would like to be able to adjust the stitches but it has no place I could find to lengthen them. I am thinking this machine was modified back in the day to be very specific. It came from a shoe repair shop and was part of a larger purchase. Any information would be greatly appreciated.
thanks Peg