Repair + Service: Nomos Tangente / calibre Alpha

IMG_1513As you all know, I’ve wanted to get my hands on a Nomos Alpha movement for some time. I’ve done a couple of Nomos watches in the past, albeit with the Peseux 7001 movement. In 2005, Nomos started producing their own in-house movements, and, as you will soon see, they are gorgeous… just like the owner of the watch, Dagmar, who has been a friend of my family for decades.IMG_1514The watch had been serviced 2 years ago, but suddenly stopped working. When I turn the winding stem, the balance doesn’t start up, so I suspect a broken mainspring.IMG_1519

The bottom plate is nicely decorated as well. The movement is like the watch – the simplicity of its design makes it so beautiful.IMG_1522

Oddly enough, one of the crown wheel screws has a broken off head.385-01

And the rest of the screw is still stuck in the plate.IMG_1525

The gear train. You can see the stop lever for the hacking second feature.IMG_1528

And yes, the mainspring is broken as suspected. If you zoom in on the barrel, you can also see that 2 teeth of the barrel wheel are missing.385-02

And here is a close-up of the missing teeth.

So what happened? My guess here is that during winding, the mainspring snapped, and the sudden shock knocked the two teeth off the barrel. I can’t quite explain the broken off screw head of the crown wheel, unless huge force was used trying to overwind the watch, which isn’t very likely. My guess is that the mainspring that was put in during the last service was slightly damaged and snapped.IMG_1529

The components of the keyless works.IMG_1530

The parts go through the cleaning machine as usual.IMG_1684

I start off by putting the balance jewels back in.IMG_1686

I ordered a barrel and mainspring, and Nomos sent me a complete barrel for £22! Note the Nomos name etched on the barrel lid, a nice touch that the old lid doesn’t have. Now these are spare part prices you can only dream of if you have an Omega or a Rolex… IMG_1690

I love this movement. Nice decoration, simplicity, and great performance. What’s not to like?

The broken off crown wheel screw came out easily, and I ordered a new one from Nomos.IMG_1692

After a first adjustment, I already have a pretty perfect timegrapher image. IMG_1696

One of the most beautiful watches you can buy. At least in my opinion 😉IMG_1697The Tangente with the Peseux 7001 is great, but having in in-house movement of such beauty and simplicity in this case makes the Alpha even more desirable. On top of that, Nomos supplies independent repairers like me with parts at very affordable prices. You know you want one 😉

 

 

10 thoughts on “Repair + Service: Nomos Tangente / calibre Alpha

  1. I have one of these, a Tangente Sport, Alpha movement, with display back. It’s nice to see inside the elegant movement and thanks for the post. It is one of my most accurate mechanical watches; and very comfortable on the wrist, too.

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  4. So happy, dass meine Uhr wieder heil ist. Und jetzt weiß ich Dank deiner Dokumentation auch, wie schön ihr Innenleben ist. Einfach klasse, Christian.

  5. Stunning design, checked the website for an automatic version and re-assured myself that I could not afford it ………….

    Back to the Tissot Seastars …..

    Regards

    Roj

    • It’s got the solid back. I don’t think I’ll get a freeby 😉

      It’s rather the guy who put the mainspring in. My guess is that he put a small kink in it.

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