NEW SINGER 163329 HOOK SHAFT GEAR & 163997 LOWER HORIZONAL SHAFT GEAR...

YOU SHOULD NEVER REPLACE A NEW GEAR AGAINST A WORN GEAR DUE TO THE BEVEL WILL NOT ALWAYS MESH  CORRECTLY AND CAN CAUSE THE OLDER GEAR TO FAIL SOON AFTER INSTALLING THE NEW ONE.

FITS THE FOLLOWING SINGER MODELS:

417, 620, 625, 626, 628, 629, 630, 630E, 635, 635E, 636, 638, 639, 640E, 645, 646, 648E, 649, 714, 717 School, 719, 724, 734, 737, 750, 755, 756, 758, 770, 774, 775, 776, 778, 900-3, 920-3, 925, 935U, 1036, 1060, 1200, 2000, 2001, 2005, 2010, 6704, 6705