Job Number 210155, Waltham 1883 Model

Up next is this Waltham 18 size, 17 jewel, 1883 model, P.S. Bartlett.

I got caught up in what I was doing and forgot to take photos of the train on this one.

I find it interesting to look over the keyless works on early stem-setting movements. It's usually a pretty simple modification of a lever design.

Running nicely...

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I had some unexpected last minute problems with the banking adjustment. Not sure how it got out of sorts, but it's fine now, I think, and the watch is ready for a few days of testing.

New Arrival, Job Number 210155

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Job Number 180046

This is a Waltham 16 size, 17 jewel  P.S. Bartlett, 1899 model, made about 1901. It's nice to see this one as relatively few of these were made.

Here is the classic Waltham motor barrel.

Clutch, etc...

Shipper...

See the complete album for this project here.

Waltham P.S. Bartlett

This is a Waltham 18 size, 15 jewels, P.S. Bartlett model. Key wind and key set.

One of the banking pin screws was broken. Again, I was able to find one (exactly one!). This is lucky. These parts are only found on the earliest Waltham 18 size movements. They are unusual for banking pins in that there is a wide head, rather than having threads that go all the way out to the top. On other watches, like a comparable Elgin for example, a variety of banking pins would work and look fine. On this movement, it has to be this one.

This movement key winds from the back. Here are some images of the mainspring ratchet on the dial side.

I think I have replaced one regulator pin on every one of these I have serviced. I have no idea why it would be so frequently missing.

This view slows the regulator, in place.

Replacing the roller jewel on one of these is a specially challenging due to the hairspring being directly above, on the same side. So I didn't take any photos of the process... It's ticking now though.

Waltham 18 Size P. S. Bartlett

 Left to right; center wheel, 4th wheel, 3rd wheel and escape (not the order the run in in the watch actually, but that is the whole train).

There was quite a bit of rust at the center of the watch, affecting the hands and freezing the cannon pinion to the center wheel shaft, and the minute wheel to the cannon pinion. I managed to get them all apart and cleaned up. Other than the hands, which are pretty bad, and I'm not sure about them yet, the various other parts have cleaned up well and will work fine.

The base plate on this movement features the replace slot and all the screw holes to support the shipper mechanism that most stem-set Walthams have. This watch is lever-set. But this run of plate could easily be used for either stem or lever set models. A retail watchmaker, if they had the parts, could also make the change.

This bottle goes back to the teens or '20s. I happen to know where it came from. There's still plenty left though.

A paste of diamontine and oil, and a shaped stick, with the lathe, provide the best means to reduce a balance staff pivot.

This is the old and broken staff in the lathe to be removed by cutting away the back hub.

When it is nearly all cut away, the balance wheel can be broken free with the staking set.

 Here is the balance wheel, the new staff, the roller table (single roller type) and the hairspring ready to be assembled.

I use an inverting staking tool. This is handy because I can just take the stake just used to finish the rivet, invert it, place the assembly in the other way, and press the roller table in place. The roller table is friction fit, using a special stake with a slot to clear the roller jewel.

To complete the balance assembly by installing the hairspring, the last two stakes used are simply inverted again and the hairspring collet press in place. The hairspring rotation is then given a fine adjustment so the stud falls in the right place, and assembly is then ready to use.

The weight of the balance wheel should be even on all side. This ruby jawed vise is used to check that.

It should sit in any orientation without turning to any particular side downward - indicating a heavier side.

This is a Waltham 1892 model, P.S. Bartlett signed 18 size, 17 jewels, lever-setting