0 Persons are tagged with #horology

#horology

elgintime@pluspora.com
Jeff Sexton

Job Numbers 210149
Reassembled, this case looked like everything would work, however it was really hard to get the movement in the case, and the stem bound badly when in winding position. Looking at the neck of the case I realized why. And I now see why the stem was broken. It's bent.

I'm not at all a gold smith, but I had to do something here. I used a lot of rubber to support the case in key places, and for leverage, and a padded vice, and was able to bend the case neck just enough so that it will work correctly. It's not straight, but I used as much force as I felt comfortable with. I'm not taking any chances. It will at least work.

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Elgin 9435733

26 new items · Album by Jeff Sexton

elgintime@pluspora.com
Jeff Sexton

Job Numbers 210149
Here is the broken stem, the sleeve and the crown. On most vintage American watches the "snap" in and out of the crown is a function of the case and these parts in the neck. You can see how the stem pops over a shoulder in the stem. You can also see the larger hub on the stem that pushes the case's latch spring down to open the front.

The second photo shows the stem I found to replace the broken one. It's a very good match (these parts are not standardized).

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Elgin 9435733

26 new items · Album by Jeff Sexton

elgintime@pluspora.com
Jeff Sexton

Job Numbers 210149
The next problem with this watch was that the winding arbor end of the stem was completely sheared off. The piece fell out as soon as I removed the movement. That's an odd thing to find broken like that, but later I found out why. The first thing to do was to figure out how to get the crown off without the stem to grip.

This required removing the latch spring from the case body, something I almost never do, so I proceeded with caution. On this case the spring is held with a retaining pin. I was able to push the pin all the way in and out of the way. Then the spring could be removed, and I could reuse the same pin when I put it back.

With the spring out of the way, the body of the stem could be gripped, the crown unscrewed and the sleeve turned out of the case neck.

See the album for this project here:
https://photos.app.goo.gl/RBDmj5j8hg5xpaXk7

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Elgin 9435733

26 new items · Album by Jeff Sexton

elgintime@pluspora.com
Jeff Sexton

Job Numbers 210149
This will need a balance staff at the very least. So far everything else in the train looks OK.

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Elgin 9435733

26 new items · Album by Jeff Sexton

elgintime@pluspora.com
Jeff Sexton

Job Numbers 210149
A replacement balance staff and one balance jewel and it's running nicely. The keyless works on these often functions poorly just due to design flaws and aged steel spring, but this movement is acting like it will be fine in that area.
There are some problems with the case to look at next.

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Elgin 9435733

26 new items · Album by Jeff Sexton

elgintime@pluspora.com
Jeff Sexton

Job Numbers 210151
Other than the broken mainspring, looks like there's no problems here.

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Elgin 30692006

11 new items · Album by Jeff Sexton

elgintime@pluspora.com
Jeff Sexton

Job Number 210145
Getting ready to cut away the hub of the old staff...

I do the same thing every time a movement like this comes up; spend all afternoon researching the balance staff. Elgin documentation calls for staff part number 861 for many 16 size movements. But there is 861-c, 861 old style and 861 new style. If it needs an 861-c it usually, but not always, says so. If it just says 861 then it could be either new style or old style.

861 new style, or 861-NS, is a bit longer than old style (861-OS) at 5.32mm. Old style is, if I recall correctly, 5.17mm. These two otherwise look the same.

861-C has an oil groove. And it is also longer at 5.32mm. However the hub is a different size. It is not usually a replacement for 861-NS. It seems like I have seen them interchanged, but I could be wrong.

I found I have just one 861-NS staff on hand anymore, and it may be an after market part. It will need a little shaping of the pivots at any rate.

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Elgin 22962681

18 new items · Album by Jeff Sexton

elgintime@pluspora.com
Jeff Sexton

Job Number 210145
There are several gadgets out there for removing the roller table from a balance assembly. This is what I use.

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Elgin 22962681

18 new items · Album by Jeff Sexton

elgintime@pluspora.com
Jeff Sexton

Job Number 210111
A roller jewel replacement and everything is working, ticking away... It's nice to work on a higher end movement, in good condition. Everything fits perfectly with fiddling around.

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Elgin 14916707

21 new items · Album by Jeff Sexton

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1 Comments
elgintime@pluspora.com
Jeff Sexton

Job Number 210096
Now for some testing. It did run quite well overnight.
Formerly job number 130054…

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Elgin 25626636

9 new photos · Album by Jeff Sexton

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elgintime@pluspora.com
Jeff Sexton

Job Numbers 210085
To my surprise the movement ran overnight, no problem. Maybe it's closer than I thought. Meanwhile I found what I think is the correct regulator. Note the pins right there practically against the side of the balance cock.

Also visible is the secondary serial number stamp. Each major part of the movement has the serial number on it.

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https://photos.app.goo.gl/xrRKiBe8eHs6S8AK6

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Elgin 1643800

47 new photos · Album by Jeff Sexton