The new 50-peso banknote (F1 Type) is the only one that has this security element.

It is a two-color butterfly divided by a rolling-bar that shifts when the banknote is tilted. On the front of the banknote, the two-color butterfly is in the upper left side. It is printed on a small clear window, also in the shape of a butterfly, which facilitates noticing the same two-color effect on the back of the banknote.