Convert from quintal [Portugal] to as, ass [Northern Europe]

Unit Definition (quintal [Portugal])
The quintal [Portugal] is a traditional unit of weight in Portugal. The Portuguese quintal is equal to 128 libras (about 129.5 pounds or 58.75 kilograms).

Unit Definition (as, ass [Northern Europe])
The as, ass [Northern Europe] is a traditional unit of mass for gold and silver, used in most of northern Europe but not in England. The unit varied in size from about 48 to 58 milligrams (0.75 to 0.90 English grain).