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  2. Silver hallmarks - Wikipedia

    en.wikipedia.org/wiki/Silver_hallmarks

    French silver made for export carries an assay mark in the shape of the head of Mercury, along with a number to indicate the millesimal fineness: "1" for .920, "2" for .840 and "3" for .750. French silver also is punched with the mark of the maker, by law in the shape of a lozenge, usually with the maker's initials and a symbol.

  3. Hallmark - Wikipedia

    en.wikipedia.org/wiki/Hallmark

    Hallmark for gold Closeup view of the hallmarks in an antique silver spoon from China In the modern world, in an attempt at standardizing the legislation on the inspection of precious metals and to facilitate international trade, in November 1972 a core group of European nations signed the Vienna Convention on the Control of the Fineness and ...

  4. Date nail - Wikipedia

    en.wikipedia.org/wiki/Date_nail

    Another example is the Milwaukee Road "R08" nail, where the "R" is an unknown treatment or type of wood, and the numbers indicate the year it was installed. [3] Date nail use has dropped dramatically since the mid-20th century and the advent of more modern maintenance of way equipment. Date nails on American railroads were phased out in the 1970s.

  5. Stamp numbering system - Wikipedia

    en.wikipedia.org/wiki/Stamp_numbering_system

    The treatment of these has long been a vexing issue, and catalogs vary greatly on whether to list the stamps. A related issue is a small number of extremely rare stamps that may or may not be old forgeries; the assignment or removal of a number is a key step in the consensus as to their authenticity.

  6. Scott catalogue - Wikipedia

    en.wikipedia.org/wiki/Scott_catalogue

    The Scott numbering system assigns plain numbers for regular mail stamps, and uses capital letter prefixes for special-purpose types, such as "B" for semi-postals and "C" for airmail. The numbers are generally consecutive; there are gaps among older stamps, where some numbered types were later renumbered, and among newer stamps where Scott has ...

  7. Celtic brooch - Wikipedia

    en.wikipedia.org/wiki/Celtic_brooch

    The 9th century Roscrea Brooch is one of a number of transitional brooches; though its form is highly ornate, with a large flat triangular pin head, the ring is thick plain silver, the gold filigree panels occupy relatively small areas, and their workmanship is a "coarse" or "crude" imitation of that of earlier works. [49]

  8. Marcel Boucher - Wikipedia

    en.wikipedia.org/wiki/Marcel_Boucher

    Jewelry by Boucher is almost always signed (meaning a marking signifying authenticity was put on the piece) and has an inventory number on it somewhere. [2] Some of the earliest marks say 'Marboux' or 'MB.' [2] Boucher used white metal in his pieces, but the entry of the US in World War II meant that metal was scarce. [3]

  9. Brooch - Wikipedia

    en.wikipedia.org/wiki/Brooch

    Wing Brooch, 2nd century AD, Metropolitan Museum of Art. A brooch (/ ˈ b r oʊ tʃ /, also US: / ˈ b r uː tʃ / [1]) is a decorative jewellery item designed to be attached to garments, often to fasten them together. It is usually made of metal, often silver or gold or some other material.