Looks more like a mounted hunt than Chogän (polo).
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4 1/2 inches wide, 3 1/4 front to back, 2 1/4 tall, fully lined.
From wikipedia -
"Khātam (Persian: خاتم) is an ancient Persian technique of inlaying. It is a version of marquetry where art forms are made by decorating the surface of wooden articles with delicate pieces of wood, bone and metal precisely-cut intricate geometric patterns. Khatam-kari (Persian: خاتمکاری) or khatam-bandi (Persian: خاتمبندی) refers to the art of crafting a khatam. Common materials used in the construction of inlaid articles are gold, silver, brass, aluminum and twisted wire. "