Most respected ladies and gentlemen,
a couple years ago a somewhat reputable European seller auctioned this specimen of
RPC II 636, which went unsold:
Now this here specimen is going to be auctioned by the same seller in a few days:
Diameter,
weight, centering, surface damage are identical, but the
patina looks entirely different. Could it be the same specimen having undergone some sort of treatment? (One that would be hardly accounted for – the coin was ranked 'very fine' in 2019 just as it is now.) Otherwise, I'd call foul play. If I'm wrong correct me, please.
Sincerely
Alois Permaneder