The Singer genuine 401, 403, 500, and 503 sewing machines utilize the Simanco 174529 straight stitch needle plate, which I classified as new old stock in beautiful unused condition. Style B.

The Singer genuine 401, 403, 500, and 503 sewing machines utilize the Simanco 174529 straight stitch needle plate, which I classified as new old stock in beautiful unused condition. Style A. Some abrasion from storage which i solved from bagging them individually The Singer genuine 401, 403, 500, and 503 sewing machines are designed to accommodate the Simanco 174529 straight stitch needle plate, which is categorized as new old stock and remains in excellent unused condition. Style B. Minor abrasions from storage have been mitigated by individually bagging each unit.