it works upside down yes. when its lying still on a surface, it runs fine. the moment I put it on, and the watch tilts, the issue starts. it will then only start when I give it a quick jerk. so if I don't notice it stopping, then it looses time. but I agree with you. I need to find a watch maker willing to work on it. would anyone perhaps know if a watch maker is capable to work on an ETA2892, would he then also be capable to work on an A2892? is it it an exact copie?