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2. USB microscope - Wikipedia

   en.wikipedia.org/wiki/USB_microscope

   The USB image of the underside of a sage leaf - more trichomes are visible on this side. A USB microscope is a low-powered digital microscope which connects to a computer's USB port. Microscopes essentially the same as USB models are also available with other interfaces either in addition to or instead of USB, such as via WiFi. They are widely ...

3. Loupe - Wikipedia

   en.wikipedia.org/wiki/Loupe

   Loupes are an essential tool in both numismatics, the study of currency, and the related practice of coin collection. Coin collectors frequently employ loupes for better evaluation of the quality of their coins, since identifying surface wear is vital when attempting to classify the grade of a coin. Uncirculated coins (coins without wear) can ...

4. Glossary of numismatics - Wikipedia

   en.wikipedia.org/wiki/Glossary_of_numismatics

   A false date put on a coin to defraud collectors, usually to make it appear more valuable. Such alterations are often easily spotted with the aid of a magnifying glass. anepigraphic coin A coin without an epigraph or inscription. Many ancient coins used only a simple picture of an animal to show value or weight. annealing

5. List of coin catalogs - Wikipedia

   en.wikipedia.org/wiki/List_of_coin_catalogs

   A coin catalog (or coin catalogue) is a listing of coin types. Information may include pictures of the obverse and reverse (front and back), date and place of minting, distribution type, translation of inscriptions, description of images, theme, metal type, mintage, edge description, orientation of the coin, weight, diameter, thickness, design credentials, shape and prices for various grades.

6. Coin collecting - Wikipedia

   en.wikipedia.org/wiki/Coin_collecting

   Coin collecting is the collecting of coins or other forms of minted legal tender. Coins of interest to collectors include beautiful, rare, and historically significant pieces. Collectors may be interested, for example, in complete sets of a particular design or denomination, coins that were in circulation for only a brief time, or coins with ...

7. National Numismatic Collection - Wikipedia

   en.wikipedia.org/wiki/National_Numismatic_Collection

   The National Numismatic Collection comprises approximately 1.6 million objects and is one of the world's largest and most diverse collections of coins, paper currency, medals, commodity currencies, financial instruments, exonumia, and related items. [1]