Two watches on the winder have started running slow.

[kasigi]

I've got two watches which I don't wear very often that have been sitting in the winder since April, both with very little wrist time.

One, a Seiko diver has started running quite slow and loses an hour or so a week and the other is a Tag Link with the 7750 movement and it's just started losing a few minutes a day.

I've not had either of them serviced and both were keeping excellent time up until now.

Any reason why this is likely to have happened?

[robertk]

It may be simply that the winder settings are not providing enough energy for the watches... If they're chrono's especially.

[kasigi]

After nearly three months? I'd have thought if that were the case that it'd have been like it since I got the winder.

[freddy333]

I agree with Robertk. The winder may not be winding the watches fully. You can easily check this by taking one off the winder, winding the crown 45 turns and setting it down (face up) and check it in 24 hours. If the time is correct (or within specs), there's a problem with the winder (or its settings). If this watch is running slow, then there may be a problem with the watches themselves. You might still check the winder to be sure it is not jerking the watches or winding them too fast, which could be the source of problems.