Currently running... but not keeping time... losing 12 minute in 24 hours.This watch need servicing and cleaning. Back cover is signed Omega...maybe back cover is not original ...I don't know the history of this watch.I'm not an expert. For details please - CHECK ALL PHOTOS WITH MAGNIFICATION - SEE BETTER THAN WITH THE HUMAN EYE!Accept any return.This watch is a very rare model and though it needs some love and attention it is a fantastic opportunity to purchase a very collectable model at a great price.