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Patek 5102 G
This Patek Philippe 5102 G in white gold features a self-winding movement. In addition to the sky chart, it shows the phases and orbit of the moon.
Patek 5970 R
Patek's 5970 R is a manually wound chronograph that also includes what watchmakers call a perpetual calendar--a mechanical system for displaying the day, date, month and year, including leap years.
Girard-Perregaux 3 gold bridges
Swiss watchmaker Girard-Perregaux's Tourbillon with perpetual calendar. The cutaways in the dial and a sapphire-crystal case back allow the wearer to see most of the watch's interior parts at work. Girard-Perregaux is one of only a handful of watchmakers that produces its own movements rather than buying them from a supplier and retrofitting them for specialized functions.