I made this piece by the method of repousee. The jaw is articulated and moves a lot when being worn-in face it can't shut up!  The skull is made of sterling silver. Comes with a 24" bronze bead chain as shown.
     The token is a commemorative 40 year anniversary of the Three Mile Island disaster near Harrisburg PA. I don't know much about the origin of the token, I found a few and decided to use them in my jewelry. There's another listing of a single token pendant on the necklace page.  Depicted in the last photo is the next listing of the skull in bronze.