The previous types (KM109 and KM107) were made of Copper-Aluminium and had a reeded edge. The new types are made of Brass plated Steel and have a plain edge.
LINK: Argentina Central Bank
LINK: Numismaster by Krause
5 centavos
Composition: Brass plated Steel
Weight: 2.00 g
Diameter: 17.20 mm
Width: 1.40 mm
Edge: plain
10 centavos
Composition: Brass plated Steel
Weight: 2.20 g
Diameter: 18.20 mm
Width: 1.30 mm
Edge: plain