100 Escudos Azores Regional Autonomy; Silver or Copper/Nickel.

Hi All.

Found this in a job lot of coins, I had presumed it was copper/nickel, entry for the base version is 16 g the silver version is 16.5g my scales shows 16.6/7 g, 

N#37197 silver entry

N#17156 copper nickel my coin looks a lot more like this one,

Is there another way to tell the difference between them?

Thanks.

The silver coin is Proof, yours does not looks like proof .