Silver mark. 1 silver-alloy mark = 19 libras. [Pedro, ch. 11: 29-30] 1 silver mark = 14 libras. Lexical Types: Money & FinanceParts of Speech: masculinenounsingular Chronicle entries in which Marco de prata appears: Citation: Crónica de D. Pedro, ch. 11: 17, 29Crónica de D. Fernando, ch. 55