anilv, Good idea, it is beginning to sound like a train gear problem. Check the going barrel teeth as well. I wonder if the teeth are free and undamaged in the train area. Your test would be a good one !. I did have an old JLC pocket watch in for repair with teeth damage where someone had tried to make it GO pushing the train round with a screwdriver !! Needless to say I begged to be excused. One does wonder how that tooth got bent? Good wishes Chopin.