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  2. Numismatic Guaranty Company - Wikipedia

    en.wikipedia.org/wiki/Numismatic_Guaranty_Company

    NGC Cert Lookup verifies all NGC-certified coins and helps combat holder counterfeiting. Using the label serial number, NGC will reveal a coin's date, denomination, grade, photo (if any), and pricing and Census info. NGC Coin Explorer lists key info about many coin issues, such as mintages and values. [15]

  3. Paper currency grading - Wikipedia

    en.wikipedia.org/wiki/Paper_currency_grading

    1928 United States ten dollar gold certificate PMG graded 55 EPQ. Paper currency grading is the process of determining the grade or condition of a bank note, one of the key factors in determining its collectible value. A banknotes grade is generally determined by crispness (Rigid, not limp paper), brightness, and depth of color.

  4. Professional Coin Grading Service - Wikipedia

    en.wikipedia.org/wiki/Professional_Coin_Grading...

    PCGS maintains CoinFacts, the "single source of information on U.S. coins." The free site publishes information about all federal and most non-federal U.S. coin issues, including their rarity statistics, PCGS Price Guide values, population data, public auction performances, die varieties, and photographs. [15] [16]

  5. Your $20 Bill May Be Worth More Than You Think: How To ... - AOL

    www.aol.com/20-bill-may-worth-more-195759603.html

    To find the value, you'll need to do a little bit of research. Read on to learn more about serial numbers on... Your $20 Bill May Be Worth More Than You Think: How To Look Up the Serial Number

  6. Fancy Serial Numbers Turn Dollar Bills Into Pricey Collectors ...

    www.aol.com/news/on-fancy-serial-numbers-dollar...

    Take a dollar bill out of your wallet. How much is it worth? Say "a dollar," and chances are, you're absolutely right. But it's also possible that the humble Washington in your hands is worth much ...

  7. List of military headstamps - Wikipedia

    en.wikipedia.org/wiki/List_of_military_headstamps

    Later French headstamps mark the 1-digit Quarter of the year of production and 2-digit Year at the 12-o'clock position (e.g. Q-YY), the letter code for the metal supplier for the case at the 3-o'clock position, the cartridge caliber and model at the 6-o'clock position, and the manufacturer at the 9-o'clock position.

  8. Product and manufacturing information - Wikipedia

    en.wikipedia.org/wiki/Product_and_manufacturing...

    The PMI annotation is created on the 3D CAD model, associated to edges and faces, and can be exported into neutral formats such as ISO 10303 STEP and 3D PDF. This information can then be used by a number of down-stream processes. PMI can be used to generate annotation on a traditional 2D drawing the data.

  9. Parts Manufacturer Approval - Wikipedia

    en.wikipedia.org/wiki/Parts_Manufacturer_Approval

    PMA may also be granted based upon prior approval of an STC . As an example: If an STC were granted to alter an existing aircraft design then that approval would also apply to the parts needed to make that modification. A PMA would be required, however, to manufacture the parts. The last method to obtain a PMA is Test & Computation.