This has to be my favourite piece from the upcoming auction at Christie's. It's a 1st/2nd century bronze finial in the shape of a Roman magistrate with a horse's head. According to the all-too-brief official description,

This intriguing bronze offers several possible interpretations. It may illustrate a folk-tale, a scene from the theater or literature. It may also represent Incitatus, the favorite horse of Caligula.