Engraving is the oldest artisanal technique for decorating timepieces. At Patek Philippe's ateliers, this once nearly extinct craft is kept alive and handed down across generations. Watch a genuine expert manually engrave delicate arabesques in the case, hands, clasp, and crown of the grand complication Ref. 5101/100R "10 Jours Tourbillon". It is a task that requires much patience, precision, and creativity.
http://www.patek.com/en/insider/rare-...