Blancpain's most distinctive complication, the Quatieme Complet or Complete Calendar is most famously exhibited in the Villeret family. Though evolving over time, the basic layout of the complication remains the same. Essentially an annual calendar, correct all year round apart from leap years, the various apertures are now set by clever under lug correctors developed by Blancpain to both provide ease of function to the user, doing away with tricky pushers on the side of the case but also to retain the integrity and aesthetics of the case. The latest version of this model adds an useful GMT feature that shows the user a second timezone at a quick glance. Easily adjustable as always, the size remains as discreet as ever.