Bronze 'Four Coiled Dragons' mirror, Eastern Zhou Dynasty, 5th century BCE. Diameter 5.1 cm; weight 24 g. Catalog 43 © 2026 Hyogo Prefectural Museum of Ancient Bronze Mirrors

The mirrored surface is gently concave, and its small diameter suggests it may be a sun flint (a tool used to start a fire by reflecting sunlight). The main motif consists of four coiled dragons, with the dragon's body extending to the left and right from the center, centered around a dragon's face facing forward.