Good evening all. I have just started to wear my old Citizen cal-3510 which is just over 18 years old. It has not had any wrist time in about 5 years. Before I mothballed it, I took out the battery to prevent any leakage. I have now fitted a new battery & the watch came back to life. The time keeping is very accurate, just like new. On testing the chronograph function, I noticed the 1/50th's second hand did not rotate, even though the seconds counter & minutes counter hands operated ok. After wearing it for a few hours, I found the 1/50th's second hand started to work intermittently in a stuttering way not quite keeping up in sync with the seconds counter. On the odd occasion it works just fine. Do I just accept the movement is bust, or is there an easy solution? Cheers!