Vintage Singer sewing machine low shank edge stitcher foot, this is the blackside version with the black colored shank (many blackside attachments still had silver tone components such as this one). This foot will fit low shank machines including the 15, 27, 28, 66, 99, 127, 128, 185, 192, 201, 221 & 222K Featherweight, 306, 319, 328, etc. Genuine, original Simanco part #36865.