Service: Alpina dead beat second clock.

P1070835This clock was used in an Alpina dealership as an accurate timekeeper. They would often be displayed to the public. This model was made with a dead beat second hand. This must have looked very impressive on a small clock like this, as it was still a long time until the quartz clocks where mass produced. I got this particular clock last year, it’s running but is not keeping very good time.

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The case is shaped like the Alpina triangle logo. I turn the clock around. The back is held in place by the feet.

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I have removed the back. It’s pretty cool there is a little window to the movement.

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The clock also has a hacking lever in the form of a pusher on the side of the case

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Removing the case back cover reveals a nicely decorated swiss lever movement.

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The dial is nice but, unfortunately the Alpina lettering is missing.

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I remove the hands and dial revealing a nice cover plate for testing the timekeeping without the dial.

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To let down the remaining power I remove the pallet fork.

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I start taking the movement apart.

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The watch consists of two gear trains; one lower one for the clock and the upper for the dead beat second hand.

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The dead beat second gear train removed.

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I can now remove the main running gear train. Looking at the dirt on the pivots, there was no doubt that a service was needed!

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Lastly I remove the cover plate to remove the setting mechanism.

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I take apart the balance cock.

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To access the lower pivot jewel I need to unscrew a plate that is screwed onto the base plate.

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I regularly change my cleaning fluid so it never gets very dirty. First I manually clean the larger parts in the cleaning solution before doing the same in the rinse solution. I do this outside as it’s smelly stuff;) The smaller parts go in the cleaning machine.

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I also go over all the case parts.

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I start by putting running gear train in place.

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The wheel to the left is actually a barrel for the centre second gear train.

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Putting the movement back together is a little more challenging for me as everything is in a larger scale to what I’m used to.

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The lower bush for the central second is very worn so I decide to replace it. The bush is fitted above central second wheel hole so it needs to be custom made with a shoulder and the right hight.

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I fit the new bushing.

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Here you can see how the small barrel engages with the winding mechanism that also winds the large barrel.

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The power is controlled by a lever mounted onto a pinion. The lever pinion engages with an intermediate pinion that is engaging with an overlapping wheel that is driven by the main gear-train.

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This movement is a little larger than the average movement that goes on the Timegrapher.

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After a lot of adjusting I get where I want to be!

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I now put the setting mechanism back together.

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I start putting the movement back together in the case.

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Case is almost back together.

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Hacking lever is simple but effective.

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I love the little peep hole looking into the lovely swan neck micro regulator.

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The brass case has been polished over the years. I fill in the markings and then give it a coat of clear lacquer.

Alpina Exact Time Dead beat second desk clock

One could say, that’s a pretty cool workshop clock!

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2 Responses to Service: Alpina dead beat second clock.

  1. Ben Francis says:

    Lovely clock! I like this a lot, noted it elsewhere in the blog too – your tour video perhaps?
    Not sure if you’re aware but there’s a strong similarity in design with ‘The Eye of Providence’ – famously referenced in Masonic culture, arms and heraldries, official seals and currencies around the world 🙂

    Like

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