I believe this piece may be from the early to mid A Magnificent RARE Very Old Bronze or Brass Eagle Plaque / Medallion / Medal. This Eagle is incredibly magnificent and this piece is quite heavy - so I believe the plaque or medallion is Bronze.
Brass plaque showing the Oba (ruler) of Benin (modern Nigeria). The plaques were looted by the British during their 1897 invasion of Benin and Nigeria has repeatedly called for the return of the Benin Bronzes from the British Museum.
Park benches throughout the city of Chester in England were recently the object of a fun prank when pranksters attached brass plaques with funny (though perhaps slightly offensive) messages to the benches that looked like dedication plaques.