A watch collection by Piaget that fosters the brand’s reputation as a producer of ultra-thin movements and elegant dress watches. In 1956, the brand unveiled Calibre 9P, the world's thinnest mechanical hand-wound movement, measuring only 2mm. Pushing the envelope, Calibre 12P was launched in 1960, becoming the thinnest self-winding - or automatic - movement in the world, at the time a mere 2.3mm and the predecessor of the current Altiplano collection.