Hamilton 931 question

Discussion in 'American Pocket Watches' started by Snide, Oct 22, 2019.

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  1. Snide

    Snide Registered User

    Mar 6, 2001
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    I am in the process of finishing up an overhaul on a Hamilton 931, S/N 47795. I looked it up in an online database to get the date of production and number produced. While I was doing that I noticed that it lists it as being a 17 jewel movement and mine is a 16 jewel movement with no jewel for the center wheel on the dial side of the movement. The only cap jewels are the balance jewels. Serial numbers match. Any thoughts?
     
  2. musicguy

    musicguy Moderator
    NAWCC Member Sponsor

    Jan 12, 2017
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    #2 musicguy, Oct 22, 2019
    Last edited: Oct 22, 2019
    Hamilton Grade Catalog says Hamilton 18s 16 jewels Hunting
    https://nawcc.org/index.php/hamilton-grade-catalog
    4000 made(according to the above source)

    It was sold to Joseph(can't read last name) in Rochester NY
    delivered to safe: 3/16/99
    Shipped(sold): 5/3/99


    Please post some photos of the watch

    Rob
     
  3. Rhett Lucke

    Rhett Lucke Board Secretary
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    Feb 18, 2001
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    Hamilton grades 930 and 931's were initially released as 16J watches. Before being discontinued and replaced by the 924 and 925's, an unknown number were finished and marked as 17J.

    This may have led to some confusion with whoever created the database your using.
     
  4. Snide

    Snide Registered User

    Mar 6, 2001
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    As per above request

    AE9CA2C8-520F-4645-ADC4-00C45CE622FA.jpeg A435645D-A2B8-412F-AC98-5F6847A68230.jpeg
     
    Jskirk, viclip and musicguy like this.
  5. John Cote

    John Cote Director
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    Aug 26, 2000
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    To add to what Rhett said, I believe there is no real exact sequence number way to determine which of these are 16 and which are 17 jewel movements. Certainly the earlier serial numbers are 16j and later tend to have had the upgrade but I think the problem with trying to set this out in a database is that Hamilton did not necessarily sell them in exact sequence so the leftovers which were upgraded were not in exact sequence.

    This is why the wise man once said that it is the watches that tell the story...not the database.

    BTW, nice watch. My father loved finding these. He had a bunch of them in his collection. I have found a few more of each. There is also a 16s corollary in the grades 976/77
     
  6. Snide

    Snide Registered User

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    It is a beautiful movement. Thanks for the info. I appreciate it.
     

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