he IWC Portuguese Perpetual Calendar IW503401 is a distinguished men’s timepiece crafted in platinum and powered by the automatic Calibre 52615 movement. Measuring 44.2 mm in diameter and 14.9 mm in thickness, the watch features a blue dial showcasing the full suite of perpetual calendar functions, including small seconds, a power-reserve display, a moonphase indicator, and a complete calendar layout. The sapphire crystal and transparent case back highlight both durability and the movement’s intricate design. Fitted with a crocodile leather strap and a matching black buckle, the watch maintains the elegant character associated with the Portuguese collection. With 30-meter water resistance and a 22 mm lug width, it balances presence with practicality. The piece is offered with its original box and papers, completing an impressive and collectible set.