1 Real Flat Disc 2nd. Family

Brazil's second-family bimetallic Real coinage followed the stabilization brought by the Plano Real of 1994, one of the few successful cold-turkey currency reforms in Latin American history — it broke hyperinflation running above 2,000% annually by introducing a transitional currency unit before the Real itself launched. The flat disc format of this family preceded the wave-edged and then the current wavy-border designs, each change driven partly by counterfeiting pressure and partly by vending machine compatibility standards adopted across the Brazilian market in the early 2000s.