Quote:
Originally Posted by padi56
All mechanical watches when the mainspring runs down could loose a few seconds, but we are only talking about a few seconds and not minutes or hours. All mechanical watches run better and more accurate when the mainspring is at peak power -reserve. So even when worn will do no harm whatsoever to give a manual wind once a week or so.
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Yes, I agree, and I do this often. I have a few other models with the older gen movements, i.e. 2 x daytonas, a sea dweller and an Explorer 1 and these all gain a few seconds a day, but mostly very consistently.
This issue is different so as to notice it. The first time I saw it I was very surprised and thought I had made a mistake, but after a few times of it happening I realized its a problem, but since I had taken it back twice, I didn't bother anymore, and now I see that others have it.
My 15 year old Daytona performs better than this BLRO. 
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116520 Daytona white, 116500 Daytona black, 126600 SD, Speedmaster Pro, 116710BLNR GMT II, Speedmaster trilogy 57, Breitling Navitimer A23322, Seiko SKX007J, Seiko Mini turtle PADI, Seiko 5 Sport Diver.
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