This Pink plastic contains attachments for a "Singer" brand sewing machine to make buttonholes. Bottom reads: "Pat. No. 2482607 and 2536620 or 2547925" I have read that this model will fit Singer machines made from 1960 to mid 1970's.
Singer Buttonhole attachment with 5 sized buttonholes with original instructions in it's plastic case. Feed cover plate and thumb screw. With original instructions. Owner also made a test piece of buttonholes on fabric and labeled them 11 inch long case. Button hole sizes in this box include 5/16, 5/8, 13/16 and 1 1/16 and 1 1/16.
I thought I wrote this review but hadn’t! Item was perfect, and in great shape! Fast shipment, too!