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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.