The only one I have had trouble with lately is an elect. I resat the regalator at 4 this morning it is right on the money after 12 hrs. I think I got it on that one. The only watches I have that will run 5 mins. fast is a 1920 New Haven and a Waterbury but I realy haven't messed with them much. I was jest useing the 5 min. as a reference I guess I should have said 2 or 3 mins.from windup untill winddown but I have learned to make my ajustments in very small movements with better results.