...The process of lining up the center locking mechanism was a tricky one, involving soldering and re-soldering. Followed by a great deal of grinding and fitting until everything was just right. Extra sprockets were riveted in place so that they can actually spin. The center locking pin is hollow so that it can be used for the storage of precious notes or scrolls. The locket was treated with a patina while wrapped in wire to give it an antique ancient feel. When the chain is in place everything is locked up tight and can not be opened. It was a pleasure to build. A real one of a kind piece.