The name was designed to be easy to pronounce in any language, short and memorable, and look beautiful when engraved on the movement and dial.
The term ``oyster case'' comes from the fact that the lid is closed tightly like an oyster shell. The case is made from a solid piece of gold and has no seams, and the crown and back cover are screwed in to make it completely waterproof.
"Perpetual" means "forever", and we have developed a self-winding mechanism that eliminates the need to wind the mainspring, with a full rotation mechanism using a 360° rotating rotor. This is the origin of today's wristwatches.
``Datejust'' As the name suggests, the date changes instantly around midnight. Before its invention, the date took time to change, so the Datejust function, which changed instantly around 0:00, was famous at the time as a groundbreaking invention.