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https://www.youtube.com/watch?v=TtPzBglsZgQ

Caliber: Zenith El Primero caliber 3610Functions: Complete calendar (Day, date, month), moonphase; chronograph link that link measures to 1/10th of second (rotates fully around dial every 10 seconds)Diameter: 30mmPower Reserve: 60 hoursWinding: AutomaticJewels: 35Frequency: link 5 Hertz (36,000 beats per hour)Additional Details: Column-wheel El Primero chronograph

The movement inside the new white gold 5811/1G is the link Patek caliber 26-330 S C, the same that came inside the last version of the 5711, from 2019 until 2021. Like the 5711, the 5811/1G is water-resistant to 120 meters. Finally, Patek has updated the bracelet's clasp: It's a fold-over link clasp, but it features a new, lockable, adjustment system that allows you to easily adjust the bracelet size link by two or four millimeters.