[IWC MarkXVIII heritage] Accuracy of the watch

Hi everyone. I wear my watch everyday and more than 10 - 12 hrs per day. The watch always run -1s/-2s per day. is it in normal comdition?

I don't know why my iwc mark18 is run "-" when it get enough power.

How about yours?

Thankss!!!

Hi,
-1,-2 is not in the specifications but in my point of view is acceptable. I have two three watches with the same accuracy and I keep them like this. I imagine your watch is recent maybe you can wait a bit, because it can change during the first months. Another possibility is to try to find an orientation during the night that gives a +. But if you are not satisfied you can bring it back to your AD.

the specification is not -4~+6?
But run “-“ is not in good feeling for me

Hi,
As far as I know, IWC specifications are to regulate movements to be +
The -4/+6 you mention are COSC specifications that are not the ones IWC conforms to.
Regards

i will try to run the eatch. Yes, i got the watch from 13 Nov , may be it dose not run smoothly now. Thanks your response!