A mid-2007 commercial geocoin called the Wretched Skull. The reverse legend says "He Who Passes This Coin Shall Be Rewarded / He Who Steals This Coin Shall Be Cursed." Of course, any of these that ended up traveling would inevitably be "stolen". (Many geocachers have no idea what a geocoin is, and that they should not be keeping it. Many know, and don't care.)
This is the regular edition antique silver skull and bones on antique gold background.
Size: 42 mm