Sewing Machine Invisible Zipper Foot

This is a specialized, all-metal presser foot designed for fitting invisible zippers. It is a high-shank style foot, indicated by the attachment fork. The key features are the two parallel grooves running along the bottom sole (partially visible in this three-quarter view, more evident at the leading edge), which are designed to guide the coils of the invisible zipper. The front end has a small curved guide pin to help position the zipper tape. This specific model features a mark that looks like a stylized 'T' within a circle on the side of the shank.