Urban Jürgensen & Sønner Perpetual Calendar Limited Edition Vegan Leather and subsequently dictated the direction

and subsequently dictated the direction of wrist worn watches for decades to come

This Night & Day model in one such watch

but some Speedmasters are more equal than others

the Omega Ranchero did not prove to be the runaway hit that the Seamaster was

Urban Jürgensen & Sønner Perpetual Calendar Limited Edition Vegan Leather and subsequently dictated the directionA perpetual calendar is like a small computer on your wrist. Think of it this way: Imagine a watch that keeps track of not only the time, but also the date, the day of the week, and the month, tells you whether its a leap year or not, and what the current phase of the moon is. Oh, and one more thing imagine it does all of this mechanically, using springs and gears, and that you only have to adjust it once every century or so. Crazy, right? Urban