Okay, here's another of my finds that I'd love to have someone with more knowledge take a look at! At the thrift store, this slip jumped out because of the higher quality. It's made of pretty heavy silk with ecru alençon (is that right?) lace inserted at the neck and hem. The silk is cut on the bias and there's a gusset on the side and a couple darts and seams at the bust to really create shape. The majority of the sewing is done by hand, minus the zigzag stitch putting in the gusset, the seam with the selvages, and construction of the strap. The main seams are french seams and the edges of silk are left raw and whipped down when attached to the lace. It looks like slips I've seen listed as from the '40s and it certainly looks like it could be that age but the thing is: the rings on the adjustable straps of the slip are plastic. Is this a slip from early into when that would have been done and if so, would that have been in or by the '40s? Or is this newer than that and just high quality? I've tried looking at vintage slips online but they usually don't mention if the rings are metal or plastic; it's not something generally photographed in detail either. So, I'd love to hear from someone who handles these! Thank you so much!