I used to collect random metal things I would find on the street the first couple of years I lived in the city. Not sure where this brass pulley came from, but I threw it in the tumbler and now years later I finally am using it for something.
I simply wired a blue bead (not sure where that came from either) with a loop, slipped the loop through the hole on the top of the pulley and attached a jump ring. The bead moves around freely similar to the pulley wheels. Reminds me of steampunk, but a lot less intricate.