The Breitling Watch Source Forums

hey guys,
my navitimer world was a little off today, so i'm asking you for little comments/help before deciding to take it to Tourneau, the AD where i bought my watch

Yesterday, my watch stopped cause i didn't use it for couple days. used the crown to wind and it was fine all day yesterday and today.
just now, i checked the watch and it has the correct time at 12:12am, but the date is off (it shows a space between 9 and 10)
i usually am up during this time and check my watch frequently, and this is the first time it happened. should i take it for service?

I bought my watch new only couple months ago, so both Tourneau warranty and Breitling warranty is good
Should i take it for service? how long does service/warranty checkup usually take?

Hi mate,

It sounds like it's part through the way in changing the date to the next day to me which is right if it's 12.12am (12 mins after midnight?)
Wait until after 3 and see if it's has the correct date, if not reset.

Or simply forward the time through an entire 31 day cycle back to today and see where the time is actually changing each day. Doesn't sound like anything to sweat about.

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SHARKMAN

As others have said it sounds like the date change process was in progress. If it gets 'stuck' then you have an issue, otherwise there's nothing to worry about.

went to AD this morning,
they told me that it should be fine...as long as it changed within an hour after 12, it should be okay
on the other hand, if it changes after 4~5 hours, there's a problem with the movement.
he said valjoux7750 movements tends to have this type of situations, and it is usually because of lack of winding/power reserve in the watch.
i don't wear the watch everyday, i usually wear it every other day, and maybe i should give it a little 15~20 winds every night...
hopefully it'll be fine, if not i'll send it back to Breitling for service after christmas

or 30-40 winds. Remember you can't over-wind it.

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SHARKMAN

When did the date end up changing? It sounds as though the date wasn't still stuck when you took it in.

The 7750 has approximately a 42 hour power reserve on a full wind, which is approximately 40 turns of the crown. If you start with a full wind and go 24 hours without wearing it, you will have depleted a little more than half of its power reserve. So, if you give the crown 20 - 25 turns every 24 hours you don't wear it, you should be fine. Another option is to get a winder.


What would you send it in for? The problem with the date change, or because it's not staying wound up?

Incorrect assumption.

That logic only holds true if the winding of the mainspring (through the crown) results in a linear provision of reserve, which it doesn't.

That's why Breitling recommend 30 turns of the crown for 24 hours of wear and 40 for a full wind.

So if you wear the watch everyday the crown should be turned 30 times a day around the same time of day?

That's the new math for you. Good to know.

Good question. Does "30 turns of the crown for 24 hours of wear" apply if you wear it daily, or if you go 24 hours without wearing it?

If you wear it daily you don't need to wind it at all - it's an automatic. The 30 turns is to restore 24 hours of reserve if the watch is just sitting on the nightstand.

Of course the actual reserve imparted through wear depends on length of time worn, activity levels, etc, but 'normal' activity is enough to provide a day's worth of reserve.

Thanks, Roff. This is why sometimes I think it would be nice to have a power reserve indicator - takes the guesswork out of it.