Aquatimer 2000 accuracy

My watch is showing a +4 seconds change in 6 hours of (on the hand) normal use....this can't be normal?

No, it is not. 4 seconds a day would be considered acceptable.

While i dont really dwell on accuracy ratings - I don't think you can simply take your 6 hour figure and multiply by 4. You are assuming the variance is consistent. You really need to time it over a 24 hour period - just so the watch has a chance to be in a variety of positions - such as evening when you're asleep... Movements are typically adjusted to multiple positions. A 24 hour period may give the watch opportunity to average out your 6 hour sample.

I would add further that positions are intended, to some extent, to average out. A watch lying flat for 6 hours overnight, then showing +4, might well even reduce to zero when worn for the next 6 hours (which seldom is horizontal for long). A much longer test, with greater sampling of varied use, is needed to tell anything.

Thank you all for the replys. I woke up this morning having placed the watch in a compleatly different position to i have been in the past (to try and average out) and now see a +12 second difference (ie +12 sec in 17 hours). I am sure this can't be right. I will continue to test but I fear my new watch (10 days now) might have a slight defect to it. Any ideas? Also, if i do intened to take it to an authorised retailer, will they send it to an official service centre or try and fix it themselves? Thank you again.

Have a little patience. My AT Galapagos was + 12-13 sec in 24 hrs directly after I bought it in January. Now it's + 3-4 seconds.
New mechanical watch needs bit of "running in". I should wait at least 2-3 months of continous operation of the watch before making any conclusions and eventually take it to your AD. Position has importance. Better it you wear it than if it yout let it rest too much. I noticed that it's more accurate if I lay it flat in the night than if I lay it on the side.

You did not mention the watch was purchased 12 days ago. Often, A new watch leaves the factory - it takes some time before it finds a customer who winds it up. With the watch stopped - for maybe weeks or months depending how long it may have taken to reach the dealer - and then sit in the dealer's display/safe for a period of time.

During that period - the lubricants can harden. After a moderate "break in period" that POLYMERMAN mentioned - the lubricants can spread more evenly - and hopefully, you see an improvement.

This is not unique to IWC - this is common to all mechanical watches.

One more thought: be sure the watch is fully wound (say, 30 complete crown revolutions) before starting any timing tests. A watch generally will be less accurate when minimally wound.

Thank you all again for the input. I will wait for the time being and post changes. Since yesterday the 18th to this moment (19th 23:55) I am noting a +25 second difference.

That's a large difference --I'm wondering if yout watch might be slightly magnetized. If you can run it through a demagnetizer (which won't hurt it) that might be worth a try.