guaranteed to fit singer sewing machine models:
266, 290, 301, 30920, 401, 411, 417e3, 431, 4552, 500, 501, 502, 503, 503a, 5910n103, 600, 603, 604, 610, 625, 626, 628, 629, 630, 631, 635, 635e3, 635e6, 635e7, 636, 638, 639, 640, 645, 646, 649, 700, 706, 708, 714, 717 school, 719, 720, 721, 724, 725, 729, 734, 734e, 737, 740, 746, 750, 750-13, 755, 756, 758, 760, 766, 770, 774, 774e, 775, 775-0167, 776, 778, 784, 786, 900-3, 920-3, 925-3 futura, 935u, 1000 futura, 1036, 1050, 1100, 1410, 1411, 1425, 18524, 2000, 2000a, 2001, 2010, 4552, 4610, 4622, 5910, 6233, 6234, 6235, 6267, 6268, 6740, 6800, 6900, 7000, 7004, 7005, 7028, 7029, 7033, 7034, 7035, 7037, 7043, 7050, 7060, 8000 series, 8019, 9005, 9008, 9010, 9012, 9015, 9015n503, 9018, 9018n503, 9020, 9022, 9027, 9027n503, 9030, 9032, 9032n503, 9034, 9044, 9110, 9113, 9117, 9123, 9124, 9130, 9133, 9134, 9135, 9137, 9143, 9210, 9217, 9224, 9240, 93220, 9323, 9323n603, 93234, 9334, 9334n603, 9400, 9408, 9410, 9416, 9417, 9420, 9423, 9430, 9432, 9440, 9444
