Are these really for printing in publications? Or are these cups used in the manufacture of chips? I've only seen actual pics of mold cups like twice and has been awhile.

http://www.ebay.com/itm/VINTAGE-OLD-POKER-CHIP-COPPER-PRINTERS-PLATES-PLAIN-1-00-M-N-MARKED-/172788378826?hash=item283afd6cca:g:gXEAAOSwOvRZcYBf