Because newer coins are harder to come by in American rolls, you probably have more than 50% copper.
I can sort bulk amounts fairly quickly - if the Queen has that Machin bust or older (1965-1989), it's copper. If it's not the Machin bust, but it has 12 sides, it's copper. You can tell at a glance with practice.
I can sort bulk amounts fairly quickly - if the Queen has that Machin bust or older (1965-1989), it's copper. If it's not the Machin bust, but it has 12 sides, it's copper. You can tell at a glance with practice.


















