that chain stitch will hold remarkably well in a seam if you tie off the ends. My mom just had a little hand crank chain stitch machine to get herself through college majoring in Home Ec in the 1940s. She said the teachers laughed at her but her work was good and the stitches held.The chain stitch is nice when you put grow tucks in a little girl's dress. If you look in your manufactured clothes you might just find some chain stitching.