BERNINA Patchwork foot #37 OLD. For machines pre manual Threader and Black numbers on the foot.  Features engraved markings for all your 1/4 in. needs. The straight stitch opening is ideal for patchwork and precision sewing. For patchwork projects with seam allowances of 3 mm (1/8 in.) or 6 mm (1/4 in.); three notches on the side for precise guidance. For 5.5 mm and 9 mm machines.