1970s Audemars Piguet Ultra Thin Skeleton 18k White Gold 5214BCAn extremely rare and stunning 1970s Audemars Piguet Ultra Thin "Skeleton" in 18k white gold. The watch is in good condition, showing only light signs of wear or minor scratches, which are to be expected for a piece of its age. The reference 5214BC, is a masterful showcase of horological artistry and technical finesse. Crafted in elegant 18k white gold, its slender case houses the beautifully openworked manual wind caliber 2003, one of the thinnest