the watch is an iwc classic, with the unmistakable elegant lines of the Novecento family. The iwc perpetual calendar is distinguished by having full year display and simultaneous correction,via the screw-down crown, of the calendars. Is an iconic iwc patent from the annin '90s. The caseback, with iwc blue protective cellophane, is tightened with screws. the watch is new, old stock, not serviced. The case has traces of oxide, but has not been deliberately polished, as it is a dealer remainder, unsold. By this time there may be slight imperfections, not visible to the naked eye. The box and slipcase, unfortunately, are not perfect, as the material that makes it up gave these problems.