Vintage black stitch length regulator indicator plate assembly for the Singer 50s era aluminum body 201K23 and 15-75 sewing machine. *Not compatible with other class 201 or 15 models. You will receive the front cover plate with mounting screws, stitch regulating plate, stitch indicator plate and thumb screw. Excellent vintage condition, the paint is glossy and the numbers are bright. Genuine, original Simanco parts #51312, 125475, 125481