Patek Philippe TechNews #5: Alarm Travel Time Ref. 5520 - Section 1
Begin your discovery of the Patek Philippe Ref. 5520 Alarm Travel Time, a self-winding grand complication that combines the exclusive two-zone Travel Time system with an innovative mechanical alarm feature. View the other related videos on our TechNews playlist or on https://www.patek.com/en/company/tech...

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Patek Philippe TechNews #5: Alarm Travel Time Ref. 5520 - Section 3

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