Issued by Hongkong Post in 2012, this is a set of six different cards, each showing a different breed of dog with corresponding Maximum Card stamp.   Of the six sets we have available now, two have special “Working Dogs in Government Services” postmarks; two have special “Philatelic Bureau” postmarks; and two have “GPO” postmarks.  Prices are the same regardless.  Each set in original Hongkong Post cellowrap.  The sets include a card of a Labrador Retriever, used as a Fire Investigation Dog.  Grades: 1