The Perpetual Calendar Ultra-thin 4300V/220R-B509 has been crafted to showcase the pinnacle of watchmaking precision. Its ultra-thin design has been developed to offer both elegance and comfort, with the perpetual calendar complication engineered to track the day, date, and month with accuracy. The sleek case has been crafted from steel, adding a modern touch to its timeless design.

The movement inside has been meticulously developed to ensure reliability, despite its thin profile. A steel bracelet has been crafted to complement the case, providing a comfortable and secure fit. The overall design has been developed to offer a seamless blend of technical innovation and refined aesthetics, making this timepiece a perfect addition to any collection.