Uncorrected error. You will see that listed for cards in the guides when for example the photo on the card is not the person named on the card, which has happened a lot. When the manufacturer issues a corrected card the result is a true variation. When it goes uncorrected it is a UER.
All of the Prestos I have looked at seem to have the dot. Does someone have it without ?
Is this another oddity for Presko...bottom border