VINTAGE 2-INCH SPECIAL OLYMPICS Bronze MEDAL Skill Courage Sharing Joy Unused

 This has NOT been polished.  SPECIAL OLYMPICS, SKILL - COURAGE - SHARING - JOY.   There are no other markings so I do not know the origin or maker.  I do not know the metal type. It does NOT stick to a magnet.  It 47 grams and is two inches across and 1/8 inch thick.  I do not know the age.  Any information about this medal would be appreciated.