[MVSNYC]

i might be missing one label, but i just did a quick search on the internet to illustrate the evolution of PSA labels...

4- square corners, number listed below grade designation (current)
3- square corners, bolder type face (most of the 2000's)
2- round corners, thinner type face, old "PSA" type face at top, hologram on back (mid 90's-2000-ish)
1- round corners, "typewriter" type face, old "PSA" type face at top, hologram on back (original) (early to mid 90's)