Grandmother's 403 is a wonder! First of all, the lady never in her lifetime bought garbage of any sort. And the 403's cover plate actually has had the groove on the front part of the slide plate worn away by the action of fabric moving over it. I have thr machine up in my sewing room and use it. Beautiful stitches!
I have it, the manual and all the appurtinances including the one that makes a saw-toothed cut at the fabrc edge while the machine is sewing a straight stitch. Yes, Grandmother liked toys for her "quality." Confession: I like them too.
Pat