1957d penny with some beautiful toning on the coin...is this something that it natural on a coin like this......is it worth a slab to keep it that way....
Not worth the cost of slabbing but more than worth of keeping and protecting it. I’d use a cent sized coin capsule.
Can't tell much from those photos, but the surface almost looks like it has been artificially treated. JMO
there's some of us who have or used to put 'em in a toaster oven to see how cool colors they can change to. lol