Singer Bobbin item # 163131

Fits Singer models 290, 290C, Touch and Sew, 600, 603, 604, 620, 620E31, 625, 626, 628, 629, 630, 630E, 635, 635E3, 635E6, 635E7, 636, 638, 639, 640, 640E, 645, 646, 648, 649, 690, 700, 720, 726, 737, 750, 755, 756, 758, 760, 770, 771, 775, 778, 1040, 1040G, 1060, 1411, 1411N, 1411U, 1425, 1425G, 1425N, and 1425U. This is a 2 part bobbin that unscrews for quick thread removal.