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A geocoin is a metal or wooden coin minted in similar fashion to a medallion, token coin, military challenge coin or wooden nickel, for use in geocaching. The first geocoins were developed by Jon Stanley (aka moun10bike) as a signature item to be placed in caches. Many of them are made to be trackable on various websites to be able to show the movement around the world and visitors to be able to leave comments when they find the coin. A geocoin typically has a diameter of to and a thickness between and . Coins with the size of are called microcoins, because they fit into microcaches (e.g. film canister). The smallest geocoins with a diameter of are called nanocoins, and have been sold since 2009. If the diameter is larger than the geocoin is called macrocoin. It has the famous saying of "that's not a coin it's an anchor". ==Signature items== Personal geocoins are a personal signature item that normally bears the geocacher's handle and personal design. For example, it was Jon Stanley's (aka moun10bike) original manufacture of a coin that started the hobby in the geocaching game. It has a stylized mountain bike and his caching handle, and on the back the geocaching logo. Geocoins are often minted by caching organizations and companies. Though not specifically a personal signature item they are a form of signature item for the organization that developed them. Groundspeak produces coins on a regular basis for their company and for the employees to give away at events. Reviewer/Moderator/Lackey Coins are another form of signature items over the years these have their own following. Many of them have taken the time to create their own signature item. In the first few years the number of coins that were a signature item for a geocaching group, or individuals far outnumbered the coins that were made to sell. However now they tend to be smaller percentage as the industry has a number of coins manufacturers that develop coins for events, holidays, or special coins. The cost to make a personal coin is fairly high. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「geocoin」の詳細全文を読む スポンサード リンク
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