Hankies like this were often sold as ready to use, or ready to be embellished with some embroidery. This one is plain except for the crocheted lace edge, which is beautifully done. I’m guessing it was machine done because of the precision of the attachment, but it’s beautiful nonetheless.
EDIT: Some ladies on Facebook who saw this photo believe the crochet is hand made. One remembers her grandmother making an almost identical one about 65 years ago. I love it, regardless, but I”m happy to learn this. It explains why the crochet looks more like it was hand made, but the edges were manufactured to allow for easy attachment. Perfection!.