Set of coins of Canada "Maple Leaf" Seasons

Over the course of several years, Canada has been issuing the Maple of the Four Seasons series.
In 2010, coins were released in denomination of 75 Canadian dollars, 585 gold, weight 12 g, circulation 1000 pcs., Designers Arnold Nogy and Susanna Blunt.
On the reverse there are maple leaves against a background of stones, a Monarch butterfly, a bird's nest, a tree trunk.