Tank Hounds 2007 Tank Hounds made this trade-only personal geocoin in mid-2007. I believe it came in antique silver and antique gold, and some were non-trackable. Size: 50 x 29.5 mm | Weight: 38.7 g on Thursday, 01 July 2010. Posted in ALL Animals, GEOCOINS, Personal, Trackable, Mammals, NON-Round, Dogs < Prev Next > Related Geocoins Tank Hounds 2006