This is a COPY of the ORIGINAL.

In ORIGINAL FORMAT, NOT DIGITIZED.

Singer Service Manual for Machines of Classes 640, 645, 646 and 648

This supplement provides instructios which apply only to Classes 640, 645, 646 and 648 Machines. All other instructions will be the same as for the 630, 635, 636 and 638 Machines.

This is an 8 1/2 Inch x 11 Inch COPY of the original. It is complete consisting of TEN (10) completely readable pages.