Thanks to the suggestion of Trez and others, we've created a new forum for the discussion of the famous Spanish Silver cob. Usually irregularly shaped silver coins in 2, 4 a nd 8 reales denominations. This forum is the place to discuss and post your cob finds!
http://forum.treasurenet.com/index.php/board,332.0.html
http://forum.treasurenet.com/index.php/board,332.0.html