Bobbin Cover Spring - Singer Part # 172957
-New replacement bobbin cover spring.
-Part # 172957
-Works with bobbin cover 172956 & 382710
-Fits Singer models 417, 714, 717, 719, 734, 737, 750, 755, 756, 758, 774, 775, 776, 778, (for 172956 and 382710 slide plates)
