Vintage Teardrop Divided Serving Dish Chip & Dip Aluminum or Pewter Bowl

My first thought is that this is a Aluminum but I saw the exact same one listed as a Pewter so I’m actually now unsure~ measurements are in the pictures probably it could use some polishing to brighten it up~ there are some light swirls and scratches, but I think a good polishing would make it look better ~ weighs 2lbs 5oz