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Coin grading[ 1] is the process of determining the grade or condition of a coin, one of the key factors in determining its collectible value. A coin's grade is generally determined by six criteria: strike, preservation, luster, color, attractiveness, and occasionally the country/state in which it was minted.
A double eagle is a gold coin of the United States with a denomination of $20. [1] (Its gold content of 0.9675 troy ounces [30.09 g] was worth $20 at the 1849 official price of $20.67/ozt.) The coins are 34 mm × 2 mm and are made from a 90% gold (0.900 fine or 21.6 kt) and 10% copper alloy and have a total weight of 1.0750 troy ounces (1.1794 ...
The Gold Code is the launch code for nuclear weapons provided to the President of the United States in their role as commander-in-chief of the armed forces. [ 1] In conjunction with the nuclear football, the Gold Codes allow the president to authorize a nuclear attack. [ 2] Gold Codes, as well as a separate nuclear football, are also assigned ...
The front of a U.S. Marine Corps birthday ball medallion. Huguenot méreau used as a challenge coin during 17th century Protestant persecution in France. A challenge coin is a small coin or medallion, bearing an organization's insignia or emblem and carried by the organization's members. Traditionally, they might be given to prove membership ...
A Half-Life 2 Steam Trading Card, depicting the G-Man. Steam Trading Cards are a digital commodity issued by Valve for use on its digital distribution service, Steam.Steam Trading Cards are a non-physical analogue of conventional trading cards, which are periodically granted to Steam users for playing games, fulfilling tasks, or by random chance.
Electrum is a naturally occurring alloy of gold and silver, [ 1][ 2] with trace amounts of copper and other metals. Its color ranges from pale to bright yellow, depending on the proportions of gold and silver. It has been produced artificially and is also known as "green gold". [ 3]
The history of coins stretches back to the first millennium BC/BCE. Notable examples of coins include the Lydian Lion coins, Persian daric and siglos, Tong Bei, the dirham and gold dinar . Coins are a major archaeological source of history. Coins convey information about language, administration, religion, economic conditions, and the ruler who ...
Microsoft Points, introduced in November 2005 as Xbox Live Points, [1] were a digital currency issued by Microsoft for use on its Xbox and Zune product lines. Points could be used to purchase video games and downloadable content from Xbox Live Marketplace, digital content such as music and videos on Zune Marketplace, along with content from Windows Live Gallery.