Here’s a sampler my grandmother made in 1950: A satin stitch hem suitable for lightweight and sheer dresses.
She stitched the satin stitch by hand. The thread is slightly thicker than ordinary sewing thread, but much thinner than cotton embroidery thread. The sampler is called ‘rolled hem’, so maybe the hem was hand-rolled prior to the satin stitch finish.
Here you’ll find part 3 and part 5 of my vintage embroidery and sewing series.