I have installed and completed a custom project watch using an Asian Clone 2824-2 movement. Dial is seated, hands set, timing within +4sec a day face up - fine. On my first test, the date flips at midnight - good job, the hands have been set to align to midnight when the date changes. I give the watch a healthy hand wind and we're off to the races. Each morning, I confirm the time keeping and date. Each morning everything looks good. Until morning 8. That's when I notice the date hasn't changed but the time is correct. I decide to manually change the date by setting the hands, it's changes at 8:00a.
Strange. I do this again. This time it changes at 9:00a. Then 10:00a. And so on.
So, the movement is keeping good time. Which to me suggests the hands aren't dragging, right? Because the time would be one hour off.
So I'm at a loss here. What could be the issue causing a consistently changing date flip, 1 hour later every day?
Thank for your help!