I have posted this before, but humor me. My father worked for Greist many years ago, so I grew up with them. He was a tool maker and would bring home rejects from the dump pile and fix them up. My mother had many, many cams. Greist made the ones for Singer and for Kenmore, just used a different plastic outer part and case. Dad introduced me to a young guy he worked with there, and we've been married 45+ years, so it's dear to my heart. My Janome 9000 has an attachment where you put your button in the back and it makes a buttonhole to fit. I like that. But I still have that oval green box you have under the pile. Have given away or trashed a few extras, and lots of duplicate cams . Didn't realize they were collectors' items. A neighbor had another of that green set on the "free" pile on her porch after a yard sale. I almost took it, but didn't bother. If I see any more free ones, I'll keep you in mind!