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Re: Seamaster accuracy
In Response To: Seamaster accuracy ()

: I just brought my Bond for two weeks and very love it. I wear 14-16 hour a
: day and place it horizontal at night. After checking with the NIST web
: clock it lose about 6-7sec/day. I'm going to check the accuracy by placing
: it in different position. But, how can it pass the chronometer test ??

If it past the chronometer test, it is tested for two days in each of the following postions:

Dial up Dial down 3 o'clock up 6 o'clock up 9 o'clock up this at 1 temperature (i believe around 20 degrees C)

(note that 12 o'clock up is not tested)

then 1 position (i believe dial up) in 3 temperatures: one colder and one warmer than "normal" temperature.

In each position, the watch must keep time within -4/+6 secs a day.

I would test it in these positions if I were you, on a temp. about 20 deg C. You can see if it meets cosc specs, if it does not, this must be due to shipping and "breaking in", like Derk said.

If it does meet cosc specs, and it does not if you wear it, this can be due to high/low temperatures, or other unusual habits of the owner. Watches perform differently if they are worn than during "static" testing, the difference depends on the habits of the owner and may thus vary from day to day.



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Seamaster accuracy
Re: Seamaster accuracy
Re: Seamaster accuracy
Re: Seamaster accuracy
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