Sigismund I's trojaks, as one of the highest denominations in his minting, were minted with due care. A good example of this is Gdansk, on whose trojak stamps any errors are unheard of. Here we have an example of one that the engraver corrected on the stamp.
A variant with a misplaced letter G in the abreviation of the word "silver" (A/GR).
A variant with the titulature ending in PRVS and the king's crown without the cross.