2pNGR 'dot in I of REPUBLICA' plate variety

This plate variety may be to the master dies used to complete the plate on account of me finding several variants of it.

On cover I find a variety with a blue corner Upper Left.



Here is the stamp...



...and details of the plate flaws.





I also find this stamp, and with a different set of flaws in addition to the one that sets it apart as this variety.









The variety is also found on the 2pNGR 'Servicio Oficial.' These two specimens have additional flaws that are different.