This is a rare item from Classical Arts memoribilia.  It is a ticket to the Metropolitan Opera on Wednesday, November 13th 1985 at 8pm, 39 years ago. There are no brands/marks indicating what kind of metal it is, but scratches around the top hole reveal that it is not plated, and it is a bronze color (see photos).  There is some discoloration and a few scratches on both sides, but the text is completely clear and undamaged.