Portuguese Automatic 7 day power runs fast

I recently purchased a new Portuguese Automatic 7 day power reserve in steel a month ago. I set the watch to the atomic clock and it runs +8.5 seconds fast a day. In 10 days it's +79 seconds. I wear it during the day which fully winds the reserve and take it off at night (about 7 hours). Seems to me this is out of tolerances and would have thought the movement is pretty mature in its generation and should be more accurate. I can put up with the 4.5 minutes fast a month but I own several other automatics including 2 Rolexes, and a Breitling. All three run a a little fast of only about +2 to 3 seconds a day.

Is there a break in period with IWC's?

+7 seconds/day is within tolerances...

Please see "faq" on the top right of pages and look for both "rate tolerances" and "accuracy after repair" (which also applies more or less to new watches).

The first section states:
[i]
The movement is adjusted in each of these positions to an average rate of between 0 and +7 seconds per day. In other words, an IWC should never be slow but may be fast by up to 7 seconds per day. The average daily tolerances for chronometer rates are between -4 and +6 seconds. This means that even a watch that loses up to 4 seconds a day can still be called a chronometer. For more information on this subject, click here.

The rate is also affected by the owner's lifestyle. The automatic movement will react differently when the wearer has an extremely active lifestyle from the way it would with a comparatively quiet person. However, any deviation from the tolerances mentioned above is not so much a question of function as of adjustment and wearing habits. [i]

Much depends also on position --usually changing postion at night will change (for better or worse) the rate. That means with trial and error you can adjust the rate.

Personally, if a watch gains 79 seconds over 10 days, but should gain only 70 seconds, I wouldn't sweat it. It won't affect your daily lifestyle --you won't be any later or earlier for anything.

But give it some time --all watches break-in a little-- and also try experimenting with positions at rest if it bothers you.

Good luck,
Michael

+7 seconds/day is within tolerances...

Thanks Michael for the reply.....I will try setting the watch down overnight in different positions over the next few weeks. I did read about tolerances in the "faq" sections before I posted. Just wanted to be sure no one felt it should be looked at by an IWC technician.

I love the watch and the simple but elegant design.

Best,

Jon

Try crown up overnight, as

that is usually a bit slower than dial up. You may also find the watch settles in a little with time and the accuracy improves.

It can be regulated to closer timekeeping, but personally I wouldn't bother unless it was getting other service.