In some parts of Spain, at least as early as the 14ᵗʰ century – ?, a unit of mass = 4 libra, about 1.185 kilograms. See this medieval law.
In Guatemala, 16ᵗʰ century, a unit of mass = 4 libra, about 1.84 kg. It was used in weighing tribute paid in fish by the Indians to the Spanish.¹
1. Dan Stanislawski.
Guatemala Villages of the 16th Century.
From a 16ᵗʰ-century list (Archive of the Indies, legajo #128), tribute paid by the town of Agalteca: “. ...los viernes y sabados y dias de Cuaresma cada dia un arrelde de pescado...”
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Last revised: 20 February 2006.