[Roger Dubuis] Where Astronomy and Excellence in Geneva Watchmaking Meet: The Birth of the Excalibur Bi-Retrograde Perpetual Calendar
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Roger Dubuis unveils the Excalibur Bi-Retrograde Perpetual Calendar featuring the new RD850 caliber. It boasts an astronomical moon phase accurate for 122 years and the Maison's iconic bi-retrograde display, certified by the Geneva Seal.