This safety feature is located on the front left-hand side of the 100-peso (gold color) and 500-peso (violet color) notes. In the band you can see the number that corresponds to the denomination.

The iridescent band replaces the iridescent planchets (small brilliant dots that change color when observed from different angles), and which were previously included in the denominations of 50-, 100-, 200- and 500-peso notes. However, some banknotes with this security feature are still in circulation.

To better observe this security feature, you should hold the note face up, place it horizontally 30 centimeters away from your eyes, and turn or tilt it.