time keeping

[Jag_NE]

Evening all, my brand new watch is loosing approx 3 seconds per day, measured against the GMT website. Assuming my source is robust, is this reasonable or not? My immediate thought was that it was not acceptable for an 8k watch but a work colleague thinks it is!

Thanks in advance.

[Squadrone Rosso]

If it's an automatic, very acceptable.

[Jag_NE]

Squadrone Rosso said:

If it's an automatic, very acceptable.

Wow, you can tell I an amateur! I presumed expensive = good time keeping!

[warren182]

Jag_NE said:

Wow, you can tell I an amateur! I presumed expensive = good time keeping!

I think you're after a casio

[CardShark]

Squadrone Rosso said:

If it's an automatic, very acceptable.

This.

OP - if you take your watch off at night leave the watch in different positions (dial up/down or crown up/down for example) and see if that then "corrects" the accuracy. Even though the parts are very small gravity still affects the way a mechanical watch runs - a well built, designed and calibrated movement will vary less, on average, than a something cheaper. As it is if your mechanical watch is 3sec out every 24h, there are 86,400 seconds in a day so 3sec isn't so bad

Out of interest, what watch is it? Is it chronometer rated?

Edited by CardShark on Tuesday 13th September 21:12

[Jag_NE]

CardShark said:

This.

OP - if you take your watch off at night leave the watch in different positions (dial up/down or crown up/down for example) and see if that then "corrects" the accuracy. Even though the parts are very small gravity still affects the way a mechanical watch runs - a well built, designed and calibrated movement will vary less, on average, than a something cheaper. As it is if your mechanical watch is 3sec out every 24h, there are 86,400 seconds in a day so 3sec isn't so bad

Out of interest, what watch is it? Is it chronometer rated?

Edited by CardShark on Tuesday 13th September 21:12

I think so, it's a Breitling chronomat, certified chronometer

[PJ S]

^
Then it’s within COSC spec – -4/+6 per day.

[thebraketester]

3s slow day is pretty good. I'd rather it be 3s fast though.

[CardShark]

Jag_NE said:

I think so, it's a Breitling chronomat, certified chronometer

I think that all new Breitlings are now rated as chronometers

[Jag_NE]

Thanks all