2006 "Clark's Party on the Yellowstone" Unnumbered Patch Set.  This set of patches commemorates the 200th anniversary of Lewis & Clark's expedition into the great Northwest.  This limited edition patch set was released in 2006 and features Clark's party voyaging down the Yellowstone River in Montana.  A total of 500 patch sets were released in this collection.  Painting by Montana artist Charlie Fritz.  (Pictured set is numbered.  This auction is not numbered.)