Rum Ron Centenario Rum Gran Legado 12 Year Old. Centenario Gran Legado is a blend of Costa Rican rums that, after undergoing a special distillation process, have matured for at least 12 years in oak barrels of brandy and whisky. The amber color of rum offers beautiful scents of dark caramel. The ending conclusion is underlined by oak tones. Large rum at an affordable price is best drunk clean at room temperature.