Portugal Heavy vintage ashtray with‎ rooster and corn

Portugal heavy vintage ashtray with rooster and corn. Selling this pretty cool vintage ashtray with a rooster with a red jewel on its eye and corn along the edges of it. It has some wear and aging to it. What I do know: it's approximately 4" across, it's heavy and has Portugal marked on it and does not appear to be magnetic. I don't see anything stamped on the back. I'm guessing it's brass but I do not know that for sure. It may be pewter. Please see all pictures for condition and measurements of this vintage ashtray.