My old singer 6267 uses these bobbins. Even though I've replaced this machine with a newer one with more features, I keep it for "heavy duty" sewing and satin stitch projects. I purchased the machine in 1987. I never had problems with the bobbin winder. In fact, LOVED the feature that allowed you to rewind the bobbin in the machine whithout ever having to take it out! The bobbins were expensive at the time, and I always bought them when there was a sale or coupon.