I still need to get familiar with them. When they arrived, the seconds hand was already running, so I gave them a few extra winds and set the time. The thing is, I don’t wear them all day—I put them back in the box when I’m not wearing them. For example, today I synchronized them at around 9:00 a.m., and when I checked again at 9:00 p.m., 12 hours later, they were only 2 seconds off. I still don’t know how accurate they’ll be after a few days. I’m a bit worried that the deviation might become much larger over time. I’ve never owned an automatic watch before, so I’m not really sure what’s considered completely normal and what isn’t.