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  2. Your Vintage and Antique Glassware Could Be Worth a Lot of ...

    www.aol.com/lifestyle/vintage-antique-glassware...

    Here's your guide to identifying whether your glass is vintage or antique, plus how to spot rare art glass, ... Any Signatures or Marks. Look to see if the glass has been signed or marked. Usually ...

  3. Westmoreland Glass Company - Wikipedia

    en.wikipedia.org/wiki/Westmoreland_Glass_Company

    The second mark, which is the more commonly known by collectors and dealers, is the intertwined W and G that Westmoreland began to use in 1946 on most of the glassware. [8] In 1981, David Grossman bought the factory from the Brainard family and changed the mark. The new mark was the word Westmoreland in a circle around three lines. [8]

  4. Northwood Glass Company - Wikipedia

    en.wikipedia.org/wiki/Northwood_Glass_Company

    Northwood mark on a vase. The most common Northwood maker mark was an underlined capital N centered inside of a circle. [13] [14] Not all pieces carry the mark but it is seen most often on carnival glass items. L.G. Wright also used a mark like it, but was forced to stop using it. [13]

  5. File:Comparative tests of chemical glassware (IA ...

    en.wikipedia.org/wiki/File:Comparative_tests_of...

    Main page; Contents; Current events; Random article; About Wikipedia; Contact us; Pages for logged out editors learn more

  6. Fill line - Wikipedia

    en.wikipedia.org/wiki/Fill_line

    A fill line on a German wine glass. Germany has had a number of weights and measures acts specifically addressing volumetric markings on glassware. Local and state laws have since been superseded by the federal Mess- und Eichgesetz ("Measurement and Calibration Act"), which in turn was updated to implement the EU directive.

  7. New Martinsville Glass Company - Wikipedia

    en.wikipedia.org/wiki/New_Martinsville_Glass_Company

    The New Martinsville Glass Company was an American manufacturer of decorative glass products. It opened in 1901 in New Martinsville, West Virginia. The company was renowned for the use of color in their glassware. They initially made tableware but quickly expanded into vanities, bare ware, lamps, and more. [1]

  8. Pontil mark - Wikipedia

    en.wikipedia.org/wiki/Pontil_mark

    Pontil scar on the base of a free-blown glass bowl. A pontil mark or punt mark is the scar where the pontil, punty or punt was broken from a work of blown glass.The presence of such a scar indicates that a glass bottle or bowl was blown freehand, while the absence of a punt mark suggests either that the mark has been obliterated or that the work was mold-blown.

  9. Opaline glass - Wikipedia

    en.wikipedia.org/wiki/Opaline_glass

    Opaline glass is a style of antique glassware that was produced in Europe, particularly 19th-century France. It was originally made by adding materials such as bone ash to lead-crystal, creating a semi-opaque glass with reddish opalescence .