Medieval Coin Weight. A circular coin-weight for checking the ryal (rose-noble). The weight depicts the king, with sword and shield, standing in a ship with a rose on the hull. The same design is used on the ryal (struck from 1465). 7.3g. Late 15th to 16th century. 18 mm diameter. The weight of 7.3g is a little lower than the ryal of 7.8g, but coin weights are usually lighter.