The El Rey cards are an entirely new discovery from Venezuela. Here's Clabby:
the two appear to be from different series; this one looks like it is from a boxing rules (Reglas De Boxeo) series. Gonna be fun to see what else is in store for us from Venezuela.
I don't think 'Cien' is a series; it appears to be an advert offering the purchase of 100 cards for 1.50 Bolivars, same as the ad on the back of the Clabby.