Singer sewing machine 2 piece system buttonhole foot (narrow to fit Singer narrow top clips this is bottom shank only) part # 31399-452 lot B 9

Foot 2-piece system top shank New Viking sewing machine 2 piece system hard to find top shank ankle part # 411744501 fits: Prisma 990 S, 990, 980, 960, 950 S, 950, 945, 940, Orchidea 1250, #1, #1+, 1200, 1100, 1090, 1070, 1070 S, 1080 Also White 8410 Euroflair, 9800