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2. Coin capsule - Wikipedia

   en.wikipedia.org/wiki/Coin_capsule

   Some types of capsules are designed with the ability to be reopened while others, once closed cannot be reopened without damaging the capsule. Many capsules now come with adjustable foam inserts in order to prevent inserted coins from moving around inside the capsule. Starting from 20mm, they can vary in sizes, including 31mm, 35mm, 44mm and 50mm.

3. United States Mint coin sizes - Wikipedia

   en.wikipedia.org/wiki/United_States_Mint_coin_sizes

   Seven distinct types of coin composition have been used over the past 200 years: three base coin alloys, two silver alloys, gold, and in recent years, platinum and palladium. The base metal coins were generally alloys of copper (for 2 cent coins and lower), and copper/nickel (for 3 and 5 cent coins). Copper/nickel composition is also used for ...

4. Coins of the United States dollar - Wikipedia

   en.wikipedia.org/wiki/Coins_of_the_United_States...

   These coins began circulating on February 15, 2007. Starting 2012, these coins have been minted only for collectible sets because of a large stockpile. The Susan B. Anthony dollar coin was minted from 1979 to 1981 and 1999. The 1999 minting was in response to Treasury supplies of the dollar becoming depleted and the inability to accelerate the ...

5. West Point time capsule that appeared to contain nothing more ...

   www.aol.com/news/west-point-time-capsule...

   The lead box believed to have been placed by cadets in the base of a monument actually contained six silver American coins dating from 1795 to 1828 and a commemorative medal, West Point said in a ...

6. List of mints - Wikipedia

   en.wikipedia.org/wiki/List_of_mints

   Today the United States Mint is largest mint manufacturer in the world, operating across six sites and producing as many as 28 billion coins in a single year. [2] Its largest site is the Philadelphia Mint which covers 650,000 square feet [3] (6 hectares) and can produce 32 million coins per day. [4]

7. Crypt of Civilization - Wikipedia

   en.wikipedia.org/wiki/Crypt_of_Civilization

   The Crypt of Civilization is an impenetrable, airtight, room-sized time capsule, built between 1937 and 1940, at Oglethorpe University in Brookhaven, Georgia.The 2,000-cubic-foot (57 m 3) repository is meant not to be opened before 8113 AD.