Your choice of one vintage Singer sewing machine top hat special disc / decorative stitch cam. These are the earlier style discs (sometimes referred to as type 1) for use with the model 401, 403, 411, 431, 500, 503, 600, 603, 626 and 648. Please refer to the picture of the stitch chart & see the option menu for the availability and pricing (pricing may vary depending on scarcity or desirability). Genuine, original Simanco accessory.