This September 29, 1993 $19 stamp (Sc #2923) of Republic of China (Taiwan) was issued as a part of its "Lucky (Mythical) Animals" series. Stamp depicts "The Black Tortoise', and the photograph shows a Southern Dynasties brick relief of it.
From wikipedia, "The Black Tortoise or Black Turtle, known in Chinese as 'Xuanwu', is one of the Four Symbols of the Chinese constellations. Despite its English name, It is usually depicted as a turtle entwined together with a snake...It represents the north and the winter season."

