Made in what is now modernday Iran in the 12th century, it forms part of the wide lexicon of expressive zoomorphic shapes used in medieval Islamic metalware.
At 13in (33cm) high, it is larger than another of the same form that is in the Metropolitan Museum of Art, New York.
In a private European collection since the early 1970s, it comes for sale with an estimate of £20,000-30,000.
The sale is part of Asian Art in London.
