Welcome to Coin Talk. Your coin is not a doubled die. IMO what you see re the wing is the result of staining and environmental damage. The beak is pareidolia. (A hit under the Eagle's beak. There is only one DDR listed for the Sac. dollars. You will find this on VarietyVista.com
Welcome to CT @Shaylee. Better luck in your search in the future. The hunt is the fun part, finding something special is the euphoria.