The Breitling Watch Source Forums

Hi there,

I recently acquired my first Breitling.. the Steelfish (blue dial)

While wearing it 24/7 it tend to gain about 5 seconds each day. I know that the COSC allows it to gain up to 6 seconds a day, BUT..

Shouldn't a B17 be better than +5 when its bought as recently as September!?

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2008 Steelfish

Not necessarily.

As there are 86,400 seconds in a day, a 5 second variance represents 99.994% accuracy, which is obviously pretty good. The COSC specification of +6/-4 represents the highest level of accuracy a mechanical movement can attain, so Breitling may be able to improve it very VERY slightly for you, but it's probably not worth the effort of being without it for a couple of weeks. Up to you though.

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Driver8

Site Moderator

well in that perspective

it does sound much more reasonable

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2008 Steelfish

Sometimes you scare the rest of us! I have never met someone who knows how many seconds in a day off the top of their head! Scary!
My new chronomat was +5 a day during the first month. Took it to the AD who sent it away for a week to be "regulated" came back +1 a day. Driver can tell you the exact % improvement and how that pertains to the planetary geosynchronous orbit, but I feel better knowing that it is as perfect as possible.

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Chronomat, Steel/Gold, MOP Dial, 2-tone band (2008)
Super Avenger Black Baton Dial (2009)
Bentley B04 GMT Silver Dial (2013)
Avenger Blacksteel Baton Dial (2014)

x2

When taking into account the accuracy of your timepiece you also have to make allowance for the "Uncertainty of Measurement".

ie the device & method used to ascertain the accuracy of the time piece.

That will have an amount of error due to several things - possibilities include:

1) Human error – checking the time deviation
2) Parallax error – viewing the hands at an angle
3) Error from the device used as a comparator – reference instrument (atomic clock etc)
4) Variation due to temperature
5) Variation due to humidity
6) Number of times checked (experiments carried out) – the more the better
7) Etc etc.

Bored yet?

Me too!

I have to say that I've only got one automatic watch and I've never checked it that accurately.

I know this has been discussed before but could be done different ways:

Checked daily or weekly (divided by 7 of course) or I guess over a longer period.

When you say 5 secs a day it does sound like a lot but when D8 puts it into perspective it seems to be pretty good.

I guess it's about a minute every 2 weeks so starts to sound a lot again but checking and adjusting the time once a month or so isn't too bad.

Getting it to 1 sec a day would be great but is it really worth the hassle - maybe taking it off at night and resting it in a certain position would compensate.

Any way - I'll bet Driver8 used a calculator

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Aerospace Titanium & Gold - Grey Face
B-1 on Fighter/Blue Shark - Blue Face
Emergency on Pro - Yellow Face

To complete the collection:
Navi 01 46/Black leather - Black/white
Montbrillant Datora/Navi - White face


LEARNING.......EVERY DAY

Better to be +5sec a day when new. It may go + a little more after bedding down, but then over time should gradually slow with wear/friction as the lube ages. E.g. -4 seconds a day after 5 years rather than -9 seconds.

Well I guess that's what comes of being a Financial Project Manager! It's all about the numbers!

But to be fair to myself, it's not a mathematical calculation of Einstein proportions! 60 secs in a minute x 60mins in an hour x 24 hours in a day, and hey presto that's 86,400 seconds in a day! Or 604,800 seconds in a week, or 31,536,000 seconds in a year, etc, ad inifinitum, ad nauseum, etc.......

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Driver8

Site Moderator

I've said it before, I put screws in bones. I would no more be able to do that calculation in my head than to calculate the national debt of South Africa on a Navi slide rule

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Chronomat, Steel/Gold, MOP Dial, 2-tone band (2008)
Super Avenger Black Baton Dial (2009)
Bentley B04 GMT Silver Dial (2013)
Avenger Blacksteel Baton Dial (2014)

you guys are killing me!

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thank you for all of the answers..

I took a walk down to an AD and had them take a quick look at the warranty papers (a fast anti replica test) and my bracelet screws which has been a bit loose..

they told me to bring it in, if I was annoyed by it, rather than making me do harsher tests..

so ill just have to figure out if missing my new fish is worth the accuracy improvement..

Another question is, do you insure your watches.. (give me some storys) to make me spend 40€ a year, plus an initial 75€ fee to get it validated (since i don't have a receipt.

Regards
TOM

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2008 Steelfish

Well, I used to have separate insurance for my watches through an insurance company specialized in watches - that way they were always insured for the full value, no depriceation.

However, now, everthing is insured by my company and I specially pointed out that I needed the full value insurance for my watches.

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Collection: http://s540.photobucket.com/albums/gg32 ... mview=grid