Tricky

I have a box of Greist attachments found at a thrift store for two dollars that are for a Rotary Style machine they came in a tan box. I also found a green metal box with Greist attachments. They are low shank attachments and do fit my Singer Featherweight the ruffled is larger than the Simanco but same markings the edge stitcher is identical except that it attaches to an attachment foot that attaches to the machine. The edge stitcher also attaches to the attachmentcfiit. Have not used them yet as I piece more than I “sew”. Greist apparently designed attachments for Singer. Have not confirmed that though.