2nd millennium BC. A large black jasper cylinder seal with frieze depicting a hero grasping the horns of two addorsed rearing human-headed bulls, each with a lion attacking from behind, sacred tree forming a terminal; accompanied by a museum-quality impression. 35.6 grams, 36mm (1 1/2"). The Signo collection, the property of a West London businessman, formed in the late 1980s-early 1990s; item number Y-169; academically researched and catalogued by the late Professor Lambert in the early 1990s.