Caliber 8500 timekeeping question…

Omega Watch Forums Omega Watch Forums

Greetings all. Hoping that someone knowledgeable in this area can shed some light on this issue.

I have a Seamaster Aqua Terra with the Caliber 8500 movement that currently keeps excellent time when I wear it during the day and rest it dial up for about 8 hours overnight, gaining only about 0.5-1.0 seconds a day. However, when I put it on a watch winder it loses about 6.0 seconds a day. In the watch winder, the watch dial sits at roughly a 45 degree angle. I decided to do a little…

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