For your consideration, here is a 1988 Premiere of the Boeing 737-400 Keychain Metal Fob Part.   It has on it “Renton, Washington, January, 26, 1988.” It has some wear on it.    The fob part measures 2 1/2 inches wide and 1 ¾ inches tall.   

It will be mailed in a bubble mailer with some foam core stiffeners.    Item pictured is the actual item up for sale and comes from a non-smoking household.  (708.2d27f-.4bx1)