1878 S Trade Dollar PCGS VF25 Vs You Grade

It looks like the example has original skin. I agree with PCGS at VF25.

True. Unappealing black toning, reverse looks to have some pitting, and that green spot is worrisome.

Grade seems right, eye appeal is a little off with the dark uneven tone.

I wonder about the storage of this coin since it was graded. I can see VF-25 here, but the surface conditions are concerning.

In addition to the green spot on the eagle's left leg (our visual right), there are other corrosion spots beginning on the obverse to the right of the second star and on the reverse to the left of the eagle's right wing (our visual left) on a line toward just below the "U" of UNITED. The dark coloration is uneven and that makes be wonder about storage humidity.

Does the label on the holder have water stains or look faded or discolored? If so, there's a chance that this could be a hurricane Katrina (2005) or Harvey (2017) coin. Is the holder from one of those eras? Many collections were submerged in flooding from those hurricanes, and coins in damaged but dried holders still appear now and then. Reholdered or resubmitted silver or bronze coins from those storms almost uniformly detail.

Just some thoughts.