According to the Archives of Piaget, the present watch was manufactured in 1969.
Moonstone has been used in Roman jewelry for nearly two thousand years, even longer in the Orient. It has always been a sacred stone in India with a special significance for lovers, and is a traditional wedding gift there. It was a popular choice for jewellers in the Art Nouveau period, and in Europe was believed to reconcile estranged lovers and to cure sleeplessness. Moonstone is known as the Traveller's Stone for the protection it affords, especially at night.
Named for its moon-like sheen, Moonstone is a Feldspar mineral exhibiting a soft, watery opaqueness and a silvery-white reflection called chatoyancy that moves as a line across the surface as light varies. Moonstone occurs in delicate shades of peach, blue, grey, white and a prismatic variety known as Rainbow Moonstone.