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Waltham ID


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I need to order a new balance staff for this Waltham.  I was able to look up serial # to date it to 1919 but could not find the caliber.  Is this a split stem?  Front load?  Thanks.

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the watch is basically a tiny pocket watch. Pull crown out to setting take the two case screws out and whatever bezel is on the front the movement should go out the front.

then you go in the pocket watch database at the link below and not as helpful as it normally would be. So we find out the grade but that's not really important missing is the model number 1907 that is more important. Then there is no parts listing which is interesting because it is in the parts book they does haven't got it into their database yet. So I'm attaching the parts listing.

classic problem with American pocket watch staffs you won't bill order wanted to you take the old one out. Jesse can see what the problem is I've attached staffing information.  then as a reminder this is a friction staff. Usually there's a blue steel hub to warn you about this but it's not always blue. So it makes it a lot easier to change if you know what you're doing.

 

https://pocketwatchdatabase.com/search/result/waltham/28806292

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Waltham Watch and Clock Material - 1948 Edition p108-110.pdf

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    • I picked up a similar amount of these jewels some years ago in a watch and clock fair. Every now and then they come in handy. This week I've got a rubbed in bombe jewel in the balance cock that is cracked and needs replacing. Very handy to have a vintage assortment of these type of jewels!
    • Great diagram with the teeth and pinion count. Simple way to reduce the speed of the hour wheel by the 12:1 minute wheel. Genius and yet so simple. Always good to reinforce the principal by what you have done in your drawing. Keep doing that. I had a drawing on my wall for years showing me this which is very similar to the drawing you have done. Here's a formula to work out the beats per hour of a watch movement. The movement's BPH is dictated by the wheel teeth and pinion count and the hairspring being vibrated to the correct BPH by finding the pinning up point on the hairspring using a vibrating tool.  The reason in the formula there is X2 on the top line is because there are two pallet stones.
    • So I just wanted to say "thank you" again.  The angle is the key bit it seems and yes, it did basically just fall, or float, back into position when I got it lined up just right. I had meant to add that now that I see how it goes in, I totally see how it came out in the first place, and that whomever cloned the original movement didn't pay much attention to the fine details around the setting or how it interfaces with the balance cock or the "rings" on the regulator and/or stud carrier arms.
    • Well I’ve never seen the make before and cannot find any info, I haven’t got it just yet it’s been left to me among a 1970’s sea master and a mid size yeoman. But if anyone has any information on this one please feel free to enlighten me, many thanks 
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