Collectible coins encompass various categories, including commemorative coins, bullion coins, and historical coins. Tokens are often issued by private entities and differ from government-minted currency, serving purposes like advertisement or admission. In the context of American numismatics, the 1866 Hard Times Tokens were created in response to economic hardship and are typically made of copper, featuring various designs including political and social messages. The Rulau numbering system classifies these tokens, with each design assigned a unique number for identification. Collectors value these items for their historical significance and as artifacts of everyday life during difficult economic periods in U.S. history.