a couple of weeks ago I noticed my Longines was nearly 5 minutes behind, I put it forward and I've been keeping an eye on it, seems to lose a couple of minutes a week. I set it to the exact second yesterday morning and this morning it seems to have lost 5 seconds which is fine, not sure how it got so far behind before. Going to keep checking it.
a couple of weeks ago I noticed my Longines was nearly 5 minutes behind, I put it forward and I've been keeping an eye on it, seems to lose a couple of minutes a week. I set it to the exact second yesterday morning and this morning it seems to have lost 5 seconds which is fine, not sure how it got so far behind before. Going to keep checking it.