What you’ve got there is a vintage mechanical counter brooch—most likely used as a knitting or crochet row counter (sometimes also called a “chatelaine counter”).
🔍 How it works
The small rotating discs with numbers are used to keep track of counts.
You’d turn the discs manually to record progress (like rows, stitches, or repeats).
The pin on the back lets it be worn on clothing, so it’s always handy while working.
