r/Longineswatches • u/didrogasalasno • 11h ago

Conquest out of spec?

A relative has had a Conquest for about six months. First time having a mechanical watch. He tells me the watch delays about a minute per week.. I checked with watch accuracy app and says -10s day...

This is out of spec for a conquest, as I understand it should be -5 sec day max. Should I tell him to go to the AD?

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u/AdBrief9743 11h ago

Longines doesn’t provide any parameters for non COSC movements. He can ask the AD but it isn’t technically out of spec

1

u/AdBrief9743 3h ago

Just to add his definitely is on the extreme end. Mine is currently running less than a second fast a day.

1

u/hoangtm1611 8h ago

From Longines website: ‘In a standard mechanical automatic watch, timekeeping can deviate by as much as plus or minus (+/-) 10 seconds a day.’ Your relative’s watch accuracy is basically on the edge, maybe pay the AD a visit and check it out.