[FrankWakefield]

Clayton, it seems extremely unlikely to me that a freshly printed sheet with wet EPDG backed cards would be stacked atop a sheet of Sovereign cards, such as that Chase card. Especially if the transferred image aligns very well with the card.

What seems much more likely is that some cards were stacked and got damp, resulting in a transfer of the image of the back of one EPDG card onto the front of that Chase Sovereign card.

When folks think of wet sheet transfer they usually mean something that happened during printing, and they want their card to be worth more. When the images line up, it seems to me that whatever happened was something that occurred outside the factory, after the cards were cut and distributed. And with differing brands, even more likely to be outside the factory.