Obouzgan is the sacred heavenly bull of Tangra. This gold dish above is likely a representation of that sacred bull and was made by the Bulgars in the early 9th century AD. It probably was used by them during their religious rites and like other ongunar represented different facets of divinity as well as nature. Shegor, the bull, represented strength and aggression, so it is likely Obouzgan carried some of these traits as well as being a messenger from Tangra (The God of the Bulgars).
all images © The Hermitage Museum, St.Petersburg, Russia; http://www.hermitagemuseum.org/