According to Official Guinness Records,
The earliest coins recorded were made during the reign of King Gyges of Lydia, Turkey, c. 630 BC and consisted of electrum, a naturally occurring amalgam of gold and silver. A Chinese uninscribed spade money of the Zhou Dynasty has been dated to c.550 BC.
For a complete list of 1900 records, please visit 1900 Guinness Records in Turkey.