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IWC Portuguese Chronograph Rattrapante 3712-05 Luxury Watch Review The IWC Portuguese is a timeless design that spans over 70 years of history, but this Portuguese Chronograph Rattrapante is a rarity in any era of IWC's legendary watch. Composed entirely of platinum and limited to 250 units, this Ref. 3712-05 is one of the most distinctive, complicated, and rarely seen members of IWC's first family of watches. The 41mm IWC Portuguese Chronograph Rattrapante combines the famous oversized round case, leaf hands, and Arabic numerals with a unique split-seconds chronograph of IWC's own design. Conceived in the late 1980s by IWC complication specialist Richard Habring, the 7750-based rattrapante employs a special module designed and built by IWC to enable separate timing of simultaneous events. Track and field, motorsports, even different computers running identical programs can be timed without stopping one either timing sequence of turn. The split-seconds mechanism is one of the most engaging and entertaining complications in the luxury watch industry, and its visual fireworks are unfailing conversation-starters among company of all stripes. But the platinum case puts this watch over the top. Due to the fact that the Portuguese Chronograph Rattrapante has been out of the IWC catalog for over a decade, any variant of this watch is rare. The 250-unit platinum run is almost unheard-of. Moreover, this IWC Portuguese Chronograph Rattrapante recently returned from factory service in Schaffhausen, and it is protected under IWC mechanical warranty until November of 2015. Available with IWC factory boxes and service paperwork, this outstanding watch is a grail-level trophy for fans of the legendary IWC Portuguese. Video and content by Tim Mosso.