There are three variants for the one-cent coin, which was issued on April 10, 1992. Two of them are made from a 92% copper-8% aluminum alloy, but differ in shape —one is circular and the other, octagonal. The third variant, of 97% copper, 0.5% tin and 2.5% zinc, is circular in shape.
    

Obverse Design
 Two laurel branches joined at one end, surrounding the inscription “EN UNIÓN Y LIBERTAD” (“in union and liberty”).
Reverse Design
 The numerical denomination, the word “centavo” (“cent”) and the year of minting.
WEIGHT
 1.77 g
DIAMETER
 16.2 mm
Thickness
 1.4 mm (octogonal) / 1.5 mm (circular)
COMPOSITION
 92% Cu - 8% Al
WEIGHT
 2.00 g
DIAMETER
 16.2 mm
Thickness
 1.5 mm
COMPOSITION
 97% Cu - 0.5% Sn - 2.5% Zn