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Pocketwatch runs fast

I have a Longines pre 1930 that runs fast. It gains about 15 minutes in 2 hours. What can cause this? How do I fix it? Thank you, tom

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Such a fast gaining usually is caused by dirty or magnetized hairspring, resulting in uneven coil amplitude (some of the coil rows are sticking together or touching each other). This causes the watch to run unbelievably fast.
To get the watch properly fixed you need to give to the watchmaker.
Alternetively; you can fix it yourself, but it will not last long.
For this you will need:
Case opener,
Dust blower (resin ball with nozzle),
Lighter fluid (ZIPPO),
Dropper (like one in eyedrops package).
Do as follows:
Open watch caseback,
Check for the fastest moving part in watch movement and you will see the hairspring fitted on it (pulsing outwards and inwards very fast).
Fill the VERY CLEAN dropper with lighter fluid.
Put ONE drop of lighter fluid on hairspring (DO NOT TOUCH IT),
Wait for a 10 seconds,
Dry out the lighter fluid with dust blower by vigorously squeezing it and pointing the nozzle on to hairspring from approx. 2-3 inches away.
Lay the watch on the table (dial down) and cover it with a clean, dustless cup. Leave for 15 minutes.
Fit the caseback on and enjoy your watch again.
Do not forget to rate, please.










Posted on Jan 27, 2009

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thank you for using fixya, you have a very fine piece of jewelry. it appears that your watch needs cleaning right on the knob and adjust mechanism. as per a service document from longines, a possible build-up or a broken first gear may cause this issue.

you may refer to their official statement when it comes to cleaning and having the watch repaired.

1) Where should I send a Longines watch that needs to be repaired, adjusted or serviced?If your Longines watch needs to be repaired, adjusted or serviced, werecommend that you bring or send it (well padded and by registereddelivery in the latter case) to your nearest Longines authorizedservice centre. You will find its address in your guarantee booklet oron our website in the Customer Service section.
2) Is the repair of a Longines watch that is more than 20 years old still possible?Yes, we still repair vintage watches at our head workshop in St-Imier.
However, without having the watch to hand, it is impossible for us tojudge its state and to know if all the necessary spare parts for therepair are still available.
Therefore, we kindly suggest that you send your watch via the nearest Longines authorized servicecentre to the Longines head office in Switzerland. Upon receipt andafter analysis of your watch, we will send you our comments and a priceestimate for the repair of your watch.
3) How often do you recommend having a maintenance service carried out on a Longines watch?We would like to draw your attention to the fact that a watch used daily is running 24 hours a day, 7 days a week non-stop.
The frequency of the maintenance service depends on the type of watch, the climate and the care taken by the watch wearer.
In general, it is necessary to have your watch controlled andserviced at least once every 4 - 5 years, just like any other precisemechanical device. This guarantees the reliability and rate precisionof your watch.
4) Which operations are included in a complete maintenance service?The following operations should be included in the price of a complete maintenance service:
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– restoration of the water-resistance (if a water-resistant model);
– refurbishing of the case or bracelet (two-tone, gold-plated and PVD-coated cases and bracelets, cleaning only);
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5) Which operations are included in a partial maintenance service?The following operations should be included in the price of a partial maintenance service:
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