Service: Longines L847.4

IMG_6729Christopher sent me this Longines for a service. The watch randomly stops, and doesn’t wind properly.

As you can see from the photos, there is a bit of varnish missing from the dial at 6 o’clock, but there isn’t much I can do about that.IMG_6733

The very nice looking L847.4 movement.IMG_6738

A very thin and elegant movement.IMG_6876

Having taken the movement apart and having cleaned it, I start off with a new mainspring.IMG_6877

The balance jewels are put into place and oiled.IMG_6879

The movement is beating again.IMG_6880

With a healthy amplitude and very stable beat rate.IMG_6881

Now I can put the bottom plate back together.IMG_6882

The movement is cased and put on the timegrapher for the final adjustment.IMG_6883

A very classy, understated manual wind Longines.


11 thoughts on “Service: Longines L847.4

  1. Hello,
    This is a silly question but will I be able to use a L847.4 mainspring and unit in a L847.3 movement?
    I was thinking as they are both L847 I could swap the parts around but I am still a beginner.

    Jake West

  2. Hello: I have almost the same watch, but with roman numerals.
    Any idea of the fabrication year? Thanks very much

  3. 9 months on and you can’t believe how well this little watch keeps time – I literally never have to adjust it unless I’ve forgotten to wind it and it stops. It doesn’t have a second hand, of course, but it’s certainly never far off. Fascinating. Thanks again Christian.

  4. Lovely to see my humble ebay watch get a post on the blog. I wanted something classic, simple and elegant for wearing to work and, in my opinion, this fitted the bill. I love it. Glad to hear others think it’s nice too. Thanks very much Christian.

  5. That movement seems quite a performer given its thinness – 2.5mm!

    Apparently there us a sub-second version… which is about the only thing that could make that watch nicer in my opinion 🙂

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