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2. Coining (metalworking) - Wikipedia

   en.wikipedia.org/wiki/Coining_(metalworking)

   The term comes from the initial use of the process: manufacturing of coins. Coining is used to manufacture parts for all industries and is commonly used when high relief or very fine features are required. For example, it is used to produce coins, badges, buttons, precision-energy springs and precision parts with small or polished surface features.

3. Coining (mint) - Wikipedia

   en.wikipedia.org/wiki/Coining_(mint)

   A coin die itself, has been the main motive for many collectors coins and medals. One of the most recent and famous one, is the Austrian 700 Years City of Hall in Tyrol coin, minted on January 29, 2003. The reverse side of the coin shows the Guldiner silver coin. However, the design is negative, representing a coin die, as a reference to Hall's ...

4. Coinage metals - Wikipedia

   en.wikipedia.org/wiki/Coinage_metals

   A number of more exotic metals have been used to make demonstration or fantasy coins which have not been used to make monetized coins for a nation-state. Some of these elements would make excellent coins in theory (e.g. zirconium). More expensive metals that are intrinsically valuable as commodities are less practical as coinage due to their ...

5. Coin Roll Hunting: 5 Tips for Making up to $100K From This Hobby

   www.aol.com/100-000-coin-roll-hunting-173433534.html

   As CNBC’s Make It reported, in 2017, newbie hunter Megan Green lucked out after months of coin roll searching, uncovering a 1969-S Doubled Die Obverse penny which could have sold for $75,000 or ...

6. Hammered coinage - Wikipedia

   en.wikipedia.org/wiki/Hammered_coinage

   Striking coins: wall relief at Rostock. In later history, in order to increase the production of coins, hammered coins were sometimes produced from strips of metal of the correct thickness, from which the coins were subsequently cut out. Both methods of producing hammered coins meant that it was difficult to produce coins of a regular diameter.

7. Reeding - Wikipedia

   en.wikipedia.org/wiki/Reeding

   [4] [5] Some gold and silver coins were reeded to discourage clipping, i.e. scraping off the precious metals from the edge of the coin, to maintain its stated value in precious metal. [4] This practice was made more difficult through the implementation of reeding by Isaac Newton in 1698, [ 6 ] during his time as warden of the Royal Mint .