This IW371446 reference Portugieser Chronograph distinguishes itself through its 40.9mm stainless steel case, a dimension that provides a balanced presence on the wrist while maintaining the collection’s classic proportions. The white dial features applied Arabic numerals filled with black lacquer, offering high legibility against the clean background. A blued steel feuille hand indicates the running seconds at 9 o’clock, while the central chronograph seconds hand and 30-minute counter at 12 o’clock are finished in the same blued steel. The watch is fitted with a genuine blue crocodile leather strap secured by a stainless steel pin buckle. The case exhibits polished and brushed surfaces with sharp, clean transitions between finishes, demonstrating IWC’s attention to detail in metalworking.
Powering this chronograph is the IWC-manufactured 69355 calibre, a self-winding movement operating at 28,800 vibrations per hour with a 46-hour power reserve. This column-wheel chronograph mechanism allows for precise activation of the start, stop, and reset functions without hesitation. The movement features a Glucydur® balance with high-precision adjustment screws on the balance wheel and a Breguet spring for improved isochronism. Through the sapphire case back, the movement displays Côtes de Genève decoration on the bridges and perlage on the base plate, with blued screws providing contrast against the rhodium-plated components. The chronograph function times intervals up to 30 minutes with clear reading from the subdial at 12 o’clock.
This particular example is in mint condition with no visible signs of wear on the case, crystal, or strap. The watch includes its original documentation card, confirming its authenticity and providing reference information for service history. Within the Portugieser collection, this reference maintains strong collector interest due to its balanced 40.9mm case size and clean dial configuration. The combination of stainless steel construction with the sophisticated white Arabic dial and blue crocodile strap represents one of the most sought-after configurations in the secondary market. IWC’s Portugieser line has demonstrated consistent value retention, with the chronograph models representing core production that continues to attract both new collectors and seasoned enthusiasts seeking a versatile, well-proportioned mechanical chronograph from a respected manufacturer.

