In the 1970s, the World Wildlife Federation was able to accomplish a significant feat when they arranged for each of twenty-four different countries to issue two proof silver crowns, each depicting some form of endangered species from their particular region of the planet. The countries issuing coins were: Afghanistan, Botswana, Colombia, Costa Rica, Ethiopia, Fiji, the Falkland Islands, Gambia, Indonesia, Jordan, Malawi, Malaysia, Mauritius, Mongolia, Nepal, Oman, Pakistan, the Seychelles, Sudan, Tanzania, Thailand, Venezuela, Zaire and Zambia. Assembling a complete collection of World Wildlife Federation crowns is an admirable yet feasible goal, as all of the coins are sold out at the mints that issued them and are only available in the secondary market. The proof silver crown shown here is one of the forty-eight coins issued and would make a great addition to any collection of wildlife or world coins.