US Navy Waltham mounted chronometer watch

Thread: US Navy Waltham mounted chronometer watch

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  1. #1
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    Picture US Navy Waltham mounted chronometer watch




    Waltham mounted chronometer watch,issued to the US Navy,37 size,15 jewel,8 day movement.Waltham used a movement they used for a automobile clock.But for the US Navy they up graded it to 15 jewels,adjusted to temp.and isochronism and given a polarity test at the time was a Naval observatory specification requirement.They were made from 1907-1937.One other requirment a winding indicator the automobile clock had a red and green dot to tell you when to wind but the Navy one had a wind indicator like ships chronometers telling you how many days before you had to wind it.The serial no on the movement 22115845 and has the US Navy serial no 847 on side of brass case.And was made around 1919.
    Last edited by river rat; November 22nd, 2008 at 02:03.

  2. #2
    Member Eeeb's Avatar
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    Re: US Navy Waltham mounted chronometer watch

    Wow... cool! I notice there is even a built in level for the gimbal. How accurate were they spec'ed to be... or were the weighted towards isochronism?
    "Forever is composed of nows." - Emily Dickinson

    "The watch has to be surrounded by a history.
    You need more than just a great design. You need to create an atmosphere around the product.
    Who is the company behind it? Why are they using this material?
    People need to be able to identify the watch with themselves. It's based on emotion." - Ralph Furter

    ...that's just my opinion and I've been wrong before and will be again and might be now!

  3. #3
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    Re: US Navy Waltham mounted chronometer watch

    Since it was used for navigation they had to be accurate they did so mutch to the movement I did not want to write it all it was fitted with a large compensation balance with a Breguet steel hairspring,an upper diamond cap jewel,gold balance and meantime screws,double roller escapement,sapphire roller jewels and powered by two mainsprings witch wound simultaneously when crown was turned it had to be good and accurate I am glad I got some good books to look up info there is so mutch to learn about watches.It was also pendent set.

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  5. #4
    Member Erik_H's Avatar
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    Re: US Navy Waltham mounted chronometer watch

    That is an interesting watch. I have been thinking of getting a primary ship chronometer like that for some time. Lovely!

    Erik_H

  6. #5
    Member JohnF's Avatar
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    Re: US Navy Waltham mounted chronometer watch

    Hi -

    Fantastic, extremely collectible.

    The interesting idea behind putting the watch on gimbals is, of course, to reduce the effects of gravity changes on the watch movement by keeping it basically in one position as much as possible. While not always possible in very bad weather when the ship would tilt severely (think hurricanes), under normal conditions the watch could be kept almost always level, meaning that the effect of gravity on the operation of the watch movement could be optimized to virtually nothing. This, coupled with the very high quality components and the work of a master watchmaker to reduce isochronism to an absolute minimum meant that these were perhaps the finest portable mechanical watch movements ever made, excelled only by by astronomy-quality precision pendulum clocks.

    Truly outstanding. I'd love to have one at my desk at work...but these are extremely rare, and when they do appear, they command more money than I have spent cumulatively on all of my watches...sigh.

    Congrats on that one!

    JohnF
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  7. #6

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    Re: US Navy Waltham mounted chronometer watch

    I just inherited one of these watches without the wooden case. Serial 18157278
    It is running and keeping good time. I wonder how much value the case adds to the total value?

  8. #7
    Member JohnF's Avatar
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    Re: US Navy Waltham mounted chronometer watch

    Hi -

    Welcome to the forum and WUS!

    We don't do valuations here, please read the sticky posts at the top of the forum as to why.

    It does add value. It's just that there's no way, short of selling it, to know how much value.

    JohnF
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  9. #8
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    Re: US Navy Waltham mounted chronometer watch

    Quote Originally Posted by stevenebartajr View Post
    I just inherited one of these watches without the wooden case. Serial 18157278
    It is running and keeping good time. I wonder how much value the case adds to the total value?
    If you need the inner box with gimbles and the outer box I know some one that makes good replacement boxes for cronometer's let me know and I will PM you with his web site I just got a outer box for mine and it's as good as the real one's I just could not find a real outer box I don't know if it add's value I did it it to protect the original inner box that had a repair crack in the wood of box and the outer box look's nice.Look for a post I did on getting the outer box and you will see his work.

  10. #9
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    Re: US Navy Waltham mounted chronometer watch

    Here is the post I did on the outer box.
    https://forums.watchuseek.com/showthread.php?t=209873

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