Took one of my old Sturmanskie chronos (made in 1995) out and tested it yesterday. The time keeping and chrono functions are working perfectly. However, I found that the date does not change smoothly, e.g. initially the date jumped to next day at about 9:00 pm, then after manually adjusting the date to July 19th (date of yesterday). I couldn't change the date by manually turning the hands anymore, even the hour hand was moved many turns . I don't if the issue has something to do with the small wire on the date wheel and am not sure if it is an easy fix.
any comments or suggestions would be greatly appreciated!
Thanks a lot!