minute hand not moving

[nrp]

I was given a Datejust model 16013 as a retirement gift from my employer and wore the whole following week with not a problem. I didn't wear it for the better part of the next week and when I went to put it on it had stopped running. I did a hand wind of roughly 30 - 40 winds of the crown and reset the time and date. a couple hours later I noticed it had lost around 10 minutes so I reset the time thinking maybe I set it wrong. I looked again about 45 minute later and it was behind by 12 minutes. This time I reset it and stared at it for the next 4 continuous 360 degree sweeps of the second hand and noticed that the minute hand had not moved from where I set it. I did this same reset 4 more times with the same result. To add one more strange quirk to this it seems if I set the time ahead of the actual time it runs and keeps that same advanced amount of time. (at least it has for the past 2 to 3 hours. Any ideas? I'm guessing as near as I can tell by the serial number this is a 1987 vintage watch.

Thanks for any help anyone can give me

[Rikki]

Sounds like the cannon pinion is worn or loose it's what holds the minute hand. Time for service and tighten cannon as part of the service. Rikki

[nrp]

Thank you for the info. It is my understanding that it is supposed to have a one year warranty that should cover it. Of course they need the bill of sale which my employer has and not me. I,ll have to see what I can do.

[bearone2]

swing 30 figure 8's for a couple days, i'm guessing it isn't wound up enough.

in the stickies:
just wearing isn't enough to keep it wound.