For Hamilton I wouldn’t be sure. I have Tissot Gentelman auto and powermatic 80 is based on the same ETA movement that Hamiltons H10 is. That movement is factory lazer regulated, meaning it is very difficult if not impossible to regulate its accuracy. I’m not sure does that affect longevity, but I feel like it’s worth mentioning.
For Hamilton I wouldn’t be sure. I have Tissot Gentelman auto and powermatic 80 is based on the same ETA movement that Hamiltons H10 is. That movement is factory lazer regulated, meaning it is very difficult if not impossible to regulate its accuracy. I’m not sure does that affect longevity, but I feel like it’s worth mentioning.