Sorry no pictures - but I found a very nice 1999s nickel yesterday. The only other proof I ever found was a 1959 nickel.
Quite often, they are the result of not meeting the minimum grade for bulk submissions. Suppose the submitter requests that only coins grading a minimum of PF69UCAM(or DCAM) be encapsulated. All others are returned to the submitter unslabbed. The submitter then has the option of selling them raw, depositing them in the bank or just spending them. Chris
I found a 69-S several months ago in pocket change and it looks like it has 5 full steps. I guess it's a proof, right?
Besides the luster, is there any other way to tell the difference between the Proofs and business strikes?