The horological term references a specific configuration of a luxury timepiece, distinguished by the azure coloration of its dial and its complex annual calendar and dual time zone functionality. This particular combination creates a striking visual aesthetic while offering practical utility for the wearer.
Its significance lies in the intersection of prestige and usability. The distinctive dial color enhances visual appeal and desirability, while the sophisticated movement provides valuable information for international travelers and those who require precise date tracking. This combination contributes to its collectibility and market value within the luxury watch segment. The original design and subsequent variations have cemented its status as an iconic representation of horological innovation and craftsmanship.