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    Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

  3. Hallmark - Wikipedia

    en.wikipedia.org/wiki/Hallmark

    The control or inspection of precious metals was an ancient concept of examination and marking, by means of inspection stamps (punch marks). The use of hallmarks, at first on silver, has a long history dating back to the 4th century AD—there is evidence of silver bars marked under authority of the Flavius Julius Constans [ 3 ] around AD 350 ...

  4. Sales tax token - Wikipedia

    en.wikipedia.org/wiki/Sales_tax_token

    Prior to the coming of World War I in the summer of 1914, only two countries, Mexico and the Philippines, made use of a general sales tax for national finance. [2] Excise tax — a transaction tax on the sale of specific items — was broadly used, however, and the idea of a general sales tax was neither unknown nor obscure to political decision-makers in the United States.

  5. Plate number coil - Wikipedia

    en.wikipedia.org/wiki/Plate_number_coil

    PNC3 - Plate Number Coil 3 - A strip of 3 mint stamps with the plate number coil on the center stamp. Although many collectors still collect coils in this format, a larger number of these collectors prefers the PNC5 format. As a result, a PNC3 is less desirable than a PNC5 as evidenced by many specialized stamp catalogs now assigning much ...

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  7. Punch (tool) - Wikipedia

    en.wikipedia.org/wiki/Punch_(tool)

    A center punch is used to mark the center of a point. It is usually used to mark the center of a hole when drilling holes. A drill has the tendency to "wander" if it does not start in a recess. A center punch forms a large enough dimple to "guide" the tip of the drill. The tip of a center punch has an angle between 60 and 90 degrees. [1]

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