worlds Oldest coin:
  LYDIAN COIN:
 This is considered as the world's oldest gold coin.
  In that coin the foreside is the lion's faceand the rear side is lions paw.

front side

back side

Lydian electrum trite (4.71g, 13x10x4 mm). This coin type, made of a gold and silver alloy, was in all likelihood the world's first, minted by King Alyattes in Sardis, Lydia, Asia Minor (present-day Turkey), c. 610-600 BC. It can be attributed, among other ways, as Weidauer 59-75  The First Coin The most fundamental debate involving these coins is whether the Lydian Lion is in fact the world's first true coin. Much here depends on what definition you use for "coin." I'm using a commonly held numismatic definition of what a coin is, which is spelled out well in Webster, Second Edition: "A piece of metal  certified by a mark or marks upon it to be of a definite exchange value and issued by governmental authority to be used as money."