Here's another vintage handkerchief from my collection with a just-finished tatted edging:
The pattern is "Asters" from Mary Konior's Tatting with Visual Patterns. The teal thread is size 70 made in Thailand. I bought it many years ago from Lacis back when there were very few sources for colorful tatting threads. I'm not sure what the brand is since I can't read Thai script, but the thread is very smooth and strong and held up to multiple (many, many multiple) unpickings and unknottings before I finished. Like a lot of the threads in my stash, I'm sure this brand is no longer available.
Here's a closeup of the edging before pinning and blocking:
2 hours ago