Mexican Silver Scales Cap Buttons. Set of eight. The Roman symbol of the Liberty Cap (a hat that only a free man could wear in ancient Rome) with rays extending outward from it appears at the top with the inscription "libertad". Below are the scales of justice. This coin celebrates the concept of liberty above and supported by law. Perfect for a lawyer's jacket, or made into earrings. The coin is made from a silver alloy with a low silver percentage. $6.00 each or 8/$45.00