entretien des pièces

OBS: Coin care is primarily of concern to the long-term collector and particularly one interested in high quality uncirculated coins. It requires the storage of each coin in a noncontaminated holder and at reasonable temperature and humidity conditions to prevent spotting, discolouration, etc.; a regular check each six months to detect the appearance of new spots or growth of previous ones; and, depending on each situation, appropriate action to retard or eliminate the damage.