Service Longines Conquest calibre: 291

P1140057A Client has sent in his Conquest calibre 291 for a service and case back enamel repair. He has also added 4 extra case backs to be repaired.

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The enamel medallion has at one point been touched up with nail varnish.

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Lovely Longines calibre 291.

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Not too bad, but slightly low amplitude.

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I remove the oscillating weight.

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I take apart the autowinder mechanism.

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I have removed the hands and dial, rather complex date mechanism.

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Here you can see the winding/setting mechanism.

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The 291 has a very unusual gear train layout with a separate cock for the escape wheel.

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Movement almost completely taken apart.

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Movement is cleaned and ready to be put back together.

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I fit a new mainspring.

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I see that the balance moves freely after fitting the shock jewels.

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Here I have fitted the setting/winding mechanism.

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Gear train going back in place.

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Gear train back together.

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We have a ticking movement again as the balance goes back in place.

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Thats more like it.

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I fit the autowinder mechanism back in place.

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Then the date mechanism goes back.

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Dial and hands go back onto the movement.

Lognines calibre 291

The movement goes back into the case.

The customer also sent 4 extra case backs including the one on the watch that needed repairing.

Longines case back repair

I remove as much of the old and damaged enamel as I can.

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I start by filling in the damaged lettering.

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I then mix up the green.

Longines conquest case back enamel repair

Case backs after 24-hour curing.

Longines Conquest calibre 291 service

Great looking watch!

It just looks so much better than before!

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