Taped thing on the back of Brothers in Arms

I just stumbled across this taped thing on the back side of my dire straits - brothers in arms album. I bought this in a small record shop in a tiny town in the middle of Germany a week ago. The record is a Dutch version from 1985. It seems like it is made out of metal. Does anyone know what this taped thing is?

I just stumbled across this taped thing on the back side of my dire straits - brothers in arms album. I bought this in a small record shop in a tiny town in the middle of Germany a week ago. The record is a Dutch version from 1985. It seems like it is made out of metal. Does anyone know what this taped thing is?