The effects of weather upon automatic watches.

[Eleven]

Over the past week I've been checking the timekeeping on 3 Rolex chronometers.

In the past two days, two of the three that were slightly fast are now slightly slow. One that was very fast is now a bit slower.

Is this weather / temperature related?

[Eleven]

TimLambert7 said:

Surely temperature will have an affect on the viscosity of lubricants and potentially alter the running speed?

What variation in temperature have they been subjected to?

Only whatever temperature difference there has been in my safe from one day to the next.

[Eleven]

CardShark said:

Eleven said:

Only whatever temperature difference there has been in my safe from one day to the next.

So a marginal difference then, I'd have thought. When you've checked them did you move them at all? The position of the watch, as in dial up/down etc, would influence the run rate more than any change in temperature in a safe IMO. The state of each watch's power reserves could also play a part.

They do get moved yes. But they are in the same positions now as they were when they were gaining and they are wound daily.