COG 2012 (Gold) COG's 2012 geocoin features a native motif. This was also issued in a silver version. Size: 38 mm on Saturday, 01 December 2012. Posted in GEOCOINS, Groups < Prev Next > Related Geocoins COG 2007 (Antique Gold)COG 2007 (Antique Copper)COG 2007 (Antique Silver)COG 2007 (Sunset Edition)COG Spring Fling 6COG 2008 (Black on Gold)COG 2008 (Gold on Black)COG 2008 (Nickel on Black)COG 2009 (Green Chair)COG 2009 (Blue Chair)COG 2010 LECOG 2011 (Gold Leaf)COG 2011 (Red Leaf)