Job Number 230002
See the album for this project here:
Job Number 220094
A broken mainspring was the only problem.
This 17 jewel Elgin 12 size is one of their "slim" models. It's thinner, but also has some unusual features (for a 12 size Elgin), such as an intermediary wheel in the winding mechanism and a detent.
The white gold case has a slim bezel for a modern look.
JS110
Job Number 220092
The movement needed a balance staff. I put the balance assembly in the lathe to cut away the broken staff and realized that the wheel was very loose. In fact it had never been correctly secured on the old staff. I just pulled it free. It's hard to believe this watch ran ok like that, even before the staff broke.
Reassembling the balance, properly riveted...
The threads for the balance cock screw were stripped, in fact completely gone. Elgin screws just dropped free into the hole.
I got out a jar of screws and found one with different pitch but a close diameter and length, and cut the head down to fit. I had to reduce the diameter of the head quite a bit, and also under cut it so the screw would reach down further than the original. It grips.
The timing screws on this were not just off but wildly wrong. So time consuming working to pull that sort of issue back into a reasonable rate...
I went to tighten the cannon pinion on this and a tiny flake of what looked like CA glue popped out from inside. Everything worked smoothly after tightening the cannon pinion properly.
I found a stem that would work as a replacement on the case. I did have to shorten the square end a bit though. The case is a pretty compact style.
The case is pretty unique. I'd hate to have to find a replacement crystal for one of these.
See the album for this project here:
Job Number 220090
Dial side...
I had to make a final adjustment to the hairspring after seeing it in the movement. I don't often use a stand like this but it was a good choice in this instance since the adjustment was right at the stud.
No problems with this one aside form the hairspring. It turned out running well.
The album for this project is here:
Job Number 220088
I felt like I should be seeing better performance and so replaced the lower balance jewel, on a hunch. There's nothing visibly wrong with they old one, but this helped. That happens sometimes.
Formerly job numbers 110068, 150225 and 210131
Modern Style Technical Diagrams of Vintage Watches
I remember once when I did not know anything at all about watches, and I mean nothing, my grandfather was showing me how things are disassembled and reassembled. I asked the pretty basic question of how he remembered where everything goes. He said, "well it only goes one way." Which is almost always true. But it wasn't until years later that I understood what he was saying, after reading some of the works of my grandfather's teacher, who was a well known watchmaker in his day. He advised that students should study and completely understand how something works before doing anything. What I realized is that the best way to know what's going on with all those parts is to fully understand how the mechanism works. Then the question doesn't even arise.
It only goes one way.































