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Omega Speedmaster Pro Moon Cal. 861 Question

 

Hello All,
I have a Speedmaster Pro cal 861 that I have had for almost two years now.  The watch runs fine, I have worn it maybe 9 months or so as I rotated it with my Seiko Prospex Marine Master 300M.  The other day when I pulled it out from safe keeping and wound it up, the ticking sound was odd, it sounded like a trotting tick.  After about 15 minutes or so this went away and it ticks fine now.  But the ticking still does not sound as tight as I remember it when I first bought it.  The watch runs fine, about 7 to 9 seconds fast per day when being worn all day and it sits face up over night.  I was told by one of my dealer acquaintances that this could be a sticky hairspring, but from what I read about that a sticky hairspring would cause the watch to run about a minute or more fast per day as the balance amplitude would be much shorter.

Has anyone ever run across this?  Is it time for a clean, oil, and adjust so soon?  Could having kept it for a month or two without winding it caused the oils to stick?  Again after the initial 15 minutes after I have wound it up from storage the trotting goes away but the ticking is still not as tight as I recall it to be.  But it is keeping time within the expected limits.

Any advice or information would be greatly appreciated.

Regards,

Richard

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