From a selection of 20p1E4 blocks: part 2 (dot to the right of 'PESOS' plate variety)

 I find this plate variety on two of the blocks, yet in none of any of the other 20p1R4 stamps at my disposal.

Upper left stamp. Dot to the right of 'PESOS'

Lower right stamp,

Here is the other block with the dot to the right of 'PESOS'

Upper right stamp has dot to the right of 'PESOS'