1980’s Longines quartz

This Longines dress watch belongs to the father of chap who sent it in. Many years ago it was taken for a new battery to be fitted only to be told the movement was kaput and it needed a new one. It’s quite an attractive little watch with its gold dial, calendar wheel and baton hands.

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A look at the movement tells us it’s a 6 jewel Longines L173.2 quartz, which is actually a Longines branded ETA 255.511. It also tells us that at some point the battery has leaked slightly and the movement is very dirty.

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With the dial and handset removed you can see the typical ETA architecture of the calendar components.

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With a dead one of these quartz movements you have little choice but to replace the circuit board/coil, the problem with doing this is the Longines branding would be lost, not to mention the circuits are very difficult to source these days. However when I checked, the circuit was producing a pulse and the coil was working, this meant something else was preventing it from running. I proceeded to strip the movement down for a service as there was a high probability that dried out lubrication and/or dirt was the culprit. You can see the muck that’s leaked from the battery in this shot, this is also deposited over the motion work and with a quartz movement it takes very little to jam the train.

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With the top plate removed you can see the wheel train beginning with the tiny stator on the left. The stator is the armature of a tiny stepper motor that is rotated in one second increments and is geared to turn the rest of the motion work.

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Just the keyless work to remove then it all went into the cleaning machine, bar the circuit of course!

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Once the components were clean and had been inspected the rebuild begins. In this shot the keyless work has been rebuilt and the train is ready for the top plate.

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A little while later the new battery is fitted and she ticks again!

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The calendar side coming together.

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Ready for the dial and handset.

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The fiddliest part of replacing the handset on a typical quartz movement is aligning the seconds hand with the markers, when it’s placed in position and lined up on a marker you can bet it will rotate on the pinion as it’s pressed home! It normally takes me a few attempts before I’m happy with it.

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The case was cleaned and the movement refitted.

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And there it is back in the land of the living, still with its original movement.

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It’s nice that the watch is still original as it was actually a presentation gift back in 1988. AM, Area Manager perhaps?

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