A 50 intis note from the Banco Central de Reserva del Perú, dated 26 June 1987, from the inti series introduced in 1985 to replace the sol de oro. The front shows Nicolás de Piérola, twice President of Peru, beside the national coat of arms. The back shows oil workers on a drilling platform, with a derrick, a helicopter and forest behind. Hyperinflation soon made the inti worthless and it was replaced in 1991.