Bobbins, Metal Class 66, Package of 10
These Class 66 metal bobbins fit many vintage Singers (see partial list below). They are excellent quality and burr-free.
Singer models 66 class, 99, 99K, 185, 201, 1200, 240 and 250 series, 288, 327, 328, 329, 337, 338, 347, 348, 350 & 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