Elgin Pocket Watch

Discussion in 'American Pocket Watches' started by HenryB, Mar 18, 2004.

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  1. HenryB

    HenryB Registered User

    Jan 13, 2004
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    San Antonio
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    It is an 11 jewel 18 size full plate grade 13 Elgin. There were 155,000 grade 13's in 38 separate runs. The manufacturing date is approximately 1876, which was the 10th year Elgin was in business.
    This movement is listed as a Hunter Movement, although, your watch may be in a hunter or an open face movement.

    This information is from the Elgin Online Database:

    http://elginwatches.org/databases/elgin_sn_intro.html
    Please copy and paste this link into your browser, as you can NOT link directly from this site.

    What type of case is the watch in Goldfilled, Coin?

    Many of these old watches run incredibly well for being 125 years old, and many of them have a real thick bevelled mineral glass crystal, that really could take a beating.
     
  2. Timebuilder

    Timebuilder Registered User

    Oct 19, 2003
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    Good information. Only one minor correction. Mineral glass was not used to make pocket watch crystals. Had it been used then you would not see so many watch crystals with scratches.

    Glass as used on watch crystals has a hardness on the Mohs Scale of about 5 and in some cases may go as high as 6. This explains how it is possible to remove scratches on pocket watch crystals using ordinary tooth paste.

    Mineral glass has a hardness of 9 on the Mohs scale. This is equal to Corundum, which by the way is what is used to make the nice ruby jewels that you see in your watches.

    Mineral glass is also used in the optics in such things as microscopes and camera lenses. Mineral glass contains other additives for additional hardness, color corrections and durability. It can be cut very thin and used on todays popular quartz watches.

    Stan Hoffman
    AWI 28827
    NAWCC 143298
    WWW.HOROLOGIST.COM
    www.stores.ebay.com/Timebuilder
     
  3. Timebuilder

    Timebuilder Registered User

    Oct 19, 2003
    686
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    One thing I failed to mention, is the name mineral glass. It is called mineral glass because the majority of the material used to form mineral glass is quartz.

    Quartz comprises about three forths of the formula, hence the name mineral glass.

    Stan Hoffman
    AWI 28827
    NAWCC 143298
    WWW.HOROLOGIST.COM
    www.stores.ebay.com/Timebuilder
     

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