Here are two cotton hankies that have had crocheted edging added to them. One is narrow crochet edging and has a powder blue monogram at one corner. It's not sure if it's meant to be an initial, and if so, possibly an 'O.' The other is much wider, open crochet stitch in variegated colors of purple.
Each are in very nice, vintage condition, with the exception of that with the purple edging. One corner is out of shape but still remains attractive.