Singer models 66 class, 201, 240 and 250 series,
288, 327, 328, 329, 337, 338, 347, 348, 350 and 360 series,
401, 403, 404, 413, 416, 417, 418, 457, 466, 476, 477, 478,
500, 502, 503, 507, 509, 513, 514, 518, 522, 527, 533, 534, 538, 560,
school models 714, 717, 719, 724, 774, 776 with apollo type hook