In Spain, especially Valencia, a unit of mass, = 1/16th of an onça, approximately 1.80 grams. Used for gold and silver. By the Spanish Postal Tariff act of 1807, the weight of letters was determined in adarmes (5 adarmes or less went for 5 reales de vellón).
In Mexico and Peru, ? – 20th centuries, a unit of mass, approximately 1.797 grams.
United Nations, 1966.
In Costa Rica, = 1/16 onza = 36 granos = 1.7971 grams.
[Costa Rica. Ministerio de formento.]
Medidas y pesas del sistema métrico, y tablas de equivalencia con las antiguas.
San José de Costa Rica: Imprenta nacional, 1885.
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Last revised: 25 February 2005.