Away from the center, in the left-hand field, the bust of Octavio Paz. Away from the center, in the right-hand field, the inscription "1990 Premio Nobel de Literatura" (1990 Nobel Prize in Literature).  In the upper field, next to the peso “$” sign, the number “20”, and below it, the name OCTAVIO PAZ.

In the upper left-hand field, the number 2010; in the upper right-hand field, the Mexican mint mark. In the exergue, next to the edge, the words “VEINTE PESOS” (TWENTY PESOS); above these words, in a semi-circle, the inscription “Todo es presencia, todos los
siglos son este presente” (Everything is presence, all centuries are the present one). Smooth edge.

Or,

On the left is a young portrait of Octavio Paz with a three quarter profile; on the right the inscription “Todo es presencia, todos los
siglos son este presente” (Everything is presence, all centuries are the present one) (on three lines) taken from the author’s poem “Fuente” (Source) about the change of millennium (the years 2000 and 2001), when the coin was minted. The poet and essayist’s signature appears in the lower part.  

In the exergue, next to the edge, is the mint year; on the left is the mint mark M° and above it, in a semi-circle, the denomination $20 (twenty pesos).