Commemorative coin

A commemorative coin is a special type of currency designed to honor a specific event, person, or anniversary. Unlike standard coins, which usually keep the same design for many years, these coins feature distinct imagery related to a particular occasion.

These coins serve different purposes depending on how they are made and used. Some are intended to move through the economy as regular money, while others are created strictly for people who collect coins, known as numismatists.

There are three primary categories of these coins. The first is regular issue coinage, which consists of the standard coins used in everyday commerce. The second type is the circulating commemorative. These are intended for use in shops, but their specific design is only released for a limited time to mark an event, such as the U.S. 50 State Quarters or certain €2 coins.

The third type is non-circulating legal tender, or NCLT. While these are technically legal money that could be used for purchases, they are actually intended as collector's items. NCLT coins are often made of precious metals like gold or silver and may feature a proof finish, which is a highly polished surface.

Historically, the design of coins has always reflected the political or economic state of a nation. In the Roman Empire, coins often served as political propaganda. They frequently depicted military campaigns or the defeat of foreign powers.

For example, a coin might show a powerful Roman warrior figure to symbolize the control of a newly conquered territory. Other coins were issued for specific financial needs. During the siege of Vienna in 1529 by the Ottoman Empire, the city issued emergency money. Because it was faster to produce, these emergency coins were often square instead of round. In Germany, these square coins are known as klippe.

Special coins have also been used to celebrate the power of monarchs. During the Mughal era in India, these were called nisar coinage. In Europe, coins called largesse were used to celebrate a coronation. In some traditions, these coins were scattered from a royal chariot to gain public attention. In Sweden, this practice continued as late as 1873 with coins called kastpenning. During the era of European nation-states, these coins became even more common. They helped build a sense of national identity and honored ruling dynasties.

In the 19th and early 20th centuries, many nations used coins to celebrate major political shifts. For instance, the Prussian thaler of 1871 commemorated the victory in the Franco-Prussian war. This victory allowed the Prussian king to be crowned as the Emperor of a unified Germany. Following this, many European states issued royal jubilee coins to celebrate long reigns. These coins were so popular that many became collector items even while they were still being minted.

The materials used to make these coins have changed significantly over time. Before World War II, commemorative coins were almost always made of precious metals. This was because base metals were often seen as unworthy of honoring a nation or a king. However, the economic challenges of World War I and the 1930s changed this. The ability to convert bank notes into gold or silver coins was restricted or ended. By approximately 1970, the use of precious metals for circulating currency was largely abandoned.

This shift led to a clear distinction between coins used for shopping and those used for collecting. In 1965, the Soviet Union issued 60 million copper-nickel-zinc roubles to mark the 20th anniversary of the victory in World War II. These were intended to circulate as regular money. In contrast, modern collectors often look for coins like the Polish 10 złotych from 2008, which features a stylized postage stamp.

Some countries, like Denmark, use a dual system. They issue aluminium bronze 20 kroner coins for daily use and silver 200 krone coins specifically for collectors. This allows the state to earn revenue from collectors while providing variety to the public's everyday change.