Cold or Old?

[CAL3135]

Good evening (Aus time) members.

I have a 2010 Sub-C which, until a week ago, was running +/- 0-0.5 seconds per day. The last time I manually wound it was around November last year, and I've been wearing it every day since -- powered by self-winding and with dead accuracy.

Last week I decided to wind it manually, and since then it's been running at +4-5 seconds per day consistently.

The watch has nevery been serviced, dropped, bumped with any kind of force, etc. I gave the watch a good clean last week -- a 10-minute soak in lukewarm soapy water, but made sure the crown was nice a secure beforehenad... and there were/are no signs of moisture under the crystal.

We've recently entered into winter, with temps dropping below 0 degrees Celsius overnight and daily highs of around 7 degrees C.

Would be grateful for any thoughts or feedback regarding the sudden change in accuracy.

[THC]

Old? No... 6 years is still an embryo in Rolex context

[The Libertine]

My thought is that the change in accuracy is more attributed to the full winding as opposed to the change in temperature.

[Etschell]

It's not the change in temp. People freeze and boil their rolex and the accuracy doesn't change.

[kromdom]

+6/-4 is still within COSC specs, right? or try to "self-regulate" to get the watch close to where you want it to be.

[jban5]

I know that this also shouldn't affect the accuracy but perhaps you could let the watch "wind down" for a couple of hours and see if that changes it.

If you are in the habit of wearing your watch to bed put it aside instead.

Just a thought

[watchwatcher]

I don't know...that does seem odd. I agree with the post above to let your power reserve run completely down and then give it a full manual wind.

[CAL3135]

Thanks for the replies and suggestions. It must've been due to manual winding, as it's now settled down and is back to being dead-on accurate again. I'll wind it manually again next week to test the theory.