Piaget was a family-owned manufacture until 1988, led only by Piaget family members. Valentin Piaget (right, in the image above) was the grandson of founder Georges-Edouard Piaget, and he played a key role in the company’s development beginning in 1945. While his brother Gerald was CEO and focused on the business, Valentin worked more on the products themselves, developing some of the thinnest calibers ever made, which helped make Piaget the paragon of elegance it is today. He was deeply involved in the creation of the calibers 9P and 12P, which were respectively ultra-slim manually-wound and automatic movements, with the 12P holding the title of the world’s slimmest automatic movement for decades.