A few thoughts:
- I originally thought this kind of yoke would be made in a mesh illusion fabric, but later decided it must be chiffon. It has a floatiness (is that a word?) to it rather than the fitted mesh of a figure skater's costume.
- I can only find this kind of design addressed in one sewing book, Singer's out-of-print Sewing for Special Occasions. The text suggests making a double layer of sheers--one is a lining and one is the outer layer. Sew right sides together, trim down the seam allowances, and flip right sides out. The problem with this method is that a double layer spoils the super-sheer effect of the dress above. I can't imagine that it's more than one layer.
- The neckline above seems to resemble a serger's rolled hem, no? It looks more like thread than fabric at the edges. Do you think that's possible given the time period? Also, would you use a serger rolled hem around a curved neckline? I would worry about stretching out the bias.
- The other option is to bind the neckline with self fabric. But it seems that would give a wider effect rather than the narrow edge in the photo. (And also be a major pain to sew in chiffon!)
Peggy Hunt photo collection on Flickr. I credit Sarai with introducing me to its wonders!