The Signature (or 7 Jewel) is another example of a fine running Japanese made machine. It has a unique type of cam that sits atop the machine, don't have the other cams, but do have the manual.
Unlike the Pfaff 130 it does not complain when starting in ZZ.
It has the older style top thread tension dial; like industrial where it turns around more than once
The motor is a hefty 1.3A
The stitch length has an odd number font but they added "clicks" to the dial so it snaps into positions