For your consideration, here is a Phantom of the Opera Oval Shaped Metal Keychain, copyright 1986.  It has some wear on it.  It measures 2 ½ by 1 3/8 inches.  It will be mailed in a box for protection.  Item pictured is the actual item up for sale and comes from a non-smoking household.  (682.2c27d-.4bx2)