Han dynasty bronze horse bit mounts, 1st-2nd century AD
Pair of bronze horse bit mounts, with scrolled openwork broad ends. North China, 1st-2nd century AD.
ref. So, Riaders & Traders, #81 for an identical pair. The design and concept comes from the West, and appears in Chinese burials in the late 3rd century BC, and gradually become more ornate. Identical bits were discovered in a Han tomb of a noble, later 2nd century, in Shaanxi Province.