Vintage Singer 66 / 99 sewing machine feed dog cover plate for darning, embroidery & other free motion sewing. It is also compatible with the 185 & 192K / Spartan - It clips onto the throat plate in seconds, and is held securely by the slide plate. Nice vintage condition, bright & rust free but may have a few minor dark spots similar to the example shown. Genuine, original Simanco accessory, part #32622