There are two differently composed variants for the twenty five-cent coin, which was issued on January 1, 1992.
 

Obverse Design
The inscriptions “REPÚBLICA ARGENTINA” (“Argentine Republic”) and “EN UNIÓN Y LIBERTAD” (“in union and liberty”) and the Buenos Aires City Hall (popularly known as “Cabildo”).
Reverse Design
The numerical denomination, the word “centavos” (“cents”) and the year of minting.
WEIGHT
5.40 g
DIAMETER
24.2 mm
THICKNESS
1.8 mm
COMPOSITION
92% Cu - 8% Al
WEIGHT
6.10 g
DIAMETER
24.2 mm
THICKNESS
1.8 mm
COMPOSITION
75% Cu - 25% Ni