Zenith movement / El Primero ..... This movement works very well and has no defects. The special thing about it is that it has never been repaired or maintained. Its condition is excellent, as you can see in the picture. The movement It is still as it came out of the factory, no maintenance has been done to it. You can tell that from the screws on it. No screwdriver has been put on it. If you want to do maintenance on it, that is your business, but it works very well. If... If you have any questions, please contact us. Thank you.