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  2. United States Mint coin sizes - Wikipedia

    en.wikipedia.org/wiki/United_States_Mint_coin_sizes

    14 mm 0.8 g 0.750 fine 1851–1853 14 mm 0.75 g 0.900 fine 1854–1873 Half Dime 15.5 mm 1.24 g 1794–1873 Dollar 15 mm 1.67 gr 1849–1889 $5 American Gold Eagle 16.5 mm 3.11 g 1986–present $10 American Platinum Eagle 16.5 mm 3.11 g 1997–present Three Cent 17.9 mm 1.94 g 1865-1889 Dime (Clad) 17.91 mm 2.268 g 1965–present Dime 17.9 mm 2 ...

  3. Fineness - Wikipedia

    en.wikipedia.org/wiki/Fineness

    For example, knowing that standard 18-carat yellow gold consists of 75% gold, 12.5% silver and the remaining 12.5% of copper (all by mass), the volume of pure gold in this alloy will be 60% since gold is much denser than the other metals used: 19.32 g/cm 3 for gold, 10.49 g/cm 3 for silver and 8.96 g/cm 3 for copper.

  4. United States cent mintage figures - Wikipedia

    en.wikipedia.org/wiki/United_States_cent_mintage...

    Matron Head large cent, 1816–1839 (Copper except as noted) Year Mint Mintage Comments 1816 (P) 2,820,982 1817 (P) 3,948,400 (P) 5 Proof 1818

  5. Body jewelry sizes - Wikipedia

    en.wikipedia.org/wiki/Body_jewelry_sizes

    Items of body piercing jewelry have an important common factor: the diameter of the part of the item of jewelry where it will rest in the piercing site. With the wearing of European-traditional kinds of earrings, that thickness is not an issue, because jewelry is made to use only thin wire for support, and the wearer need only have a narrow piercing hole to accommodate it.

  6. Type set - Wikipedia

    en.wikipedia.org/wiki/Type_set

    A Type Set may contain the designs of only one denomination. For example, the dime has had 12 - 14 distinct designs. The definition of what constitutes a design is subjective but collectors generally follow those listed in the authoritative Red Book (A Guide Book of United States Coins), which says: "A series of coins defined by a shared distinguishing design, composition, denomination, and ...

  7. Penny (unit) - Wikipedia

    en.wikipedia.org/wiki/Penny_(unit)

    Nails under 1 + 1 ⁄ 4 inch, often called brads, are sold mostly in small packages with only a length designation or with length and wire gauge designations; for example, 1″ 18 ga. or 3 ⁄ 4 ″ 16 ga. Penny sizes originally referred to the price for a hundred (100) or long hundred (120) nails in England in the 15th century: [1] the larger ...