Four Chinese characters (seal script, small characters, spead feet of Bao) Jing You Yuan Bao / Blank. 25mm, 3.46 grams. Issued in 1034-1038 AD. Schjoth #492 var; Hartill 16.87.

The Song Dynasty was a ruling dynasty in China between 960 and 1279; it succeeded the Five Dynasties and Ten Kingdoms Period, and was followed by the Yuan Dynasty. It was the first government in world history to issue banknotes or paper money, and the first Chinese government to establish a permanent standing navy. This dynasty also saw the first known use of gunpowder, as well as first discernment of true north using a compass. 

This coin is unconditionally guaranteed to be authentic.