Cordonnet crochet thread size 40, 15 g. Steel crochet hook US size 12 (0.75mm) or size for gauge.

Pattern 8, page 17, of Magic Crochet 154. No name given.
pattern 10 in Lace of Europe.
Shown on cover of 1000 Mailles, #302, called “Empreinte”

First two rounds measure 1.25” in diameter. Advanced. 23 rounds.