I have had my Navitimer 21J for close to 5 years now, with no problems. I dont even use a watch whinder! Anyway, the other day I noticed that the hour hand gets stuck when its time to change the date in the 12 o'clock position. If I manually change the date (without even touching the hour hand) the hour hand continues to work until once again after 24 hours (when its time to change the date) the hour hand gets stuck again. The crown spins freely. Any suggestions on the fix? If so is this easy to do?