Sewing Machine Parts Bobbin Case Singer #Q6A0764000 For 3323 4411 4423 5511 5523 Sewing Machine Parts Bobbin Case Singer #Q6A0764000 For 3323 4411 4423 5511 5523 Guaranteed to fit Singer Sewing Machine Models: 2010 (Professional), 2010 Superb, 3321, 3323 Talent, 4411 Heavy Duty, 4423 (Heavy Duty), 44S,5523 Heavy Duty, 9100, ET-1 (Perfect Finish)