The embroidery and drawn-thread work are so fine you cannot see the stitches with the naked eye. Here are two screenshots I took when I blew up the above scan.
That's satin stitch, not outline stitch. And check out the buttonhole stitch around the edge.
Here is one I'm keeping for myself and framing. The drawn-thread work is amazing! This is actual size. Again, too small to see the detail.
Here is the detail.
Can you imagine the size of the needle and the time it took to work this?
Check out the other hankies I have for sale in my Etsy store. Today I found an unused lipstick hankie from the 1950's. They were made in a dark red cotton so you could correct your lipstick and not mess up a nice white hankie.
I have a small collection of children's hankies packed away and will dig them out for subsequent posts.