The IWC Portugieser Perpetual Calendar 44 (ref. IW503701) introduced in 2024 marks a compelling evolution of IWC’s classic calendar complication, presented here in the brand’s proprietary Armor Gold – a blend engineered for greater hardness and lasting brilliance.

Housed in a 44mm Armor Gold case, the watch showcases a silver dial with harmoniously balanced subdials displaying date, day, month, and moonphase, all precisely governed by the in-house calibre 52616. This self-winding movement delivers an impressive 168-hour power reserve, thanks to its dual-barrel architecture, and drives the perpetual calendar mechanism without need for manual correction until 2100. The display is calibrated for leap years and advances all indications in perfect synchrony, while water resistance of up to 30 m supports practical wear.

Ref. IW503701 combines the heritage aesthetics of the Portugieser line with modern technical ambition, wrapped in a precious metal case designed for longevity. It encapsulates the fusion of timeless design and mechanical foresight that characterises IWC’s most distinguished complications.