In the late 1930s, two Portuguese businessmen ordered wristwatches with the precision of marine chronometers from the International Watch Co. The first “large wristwatch” with a pocket watch calibre was very much ahead of its time. In 1993, this model celebrated its comeback, and was now known as the Portugieser. The Portugieser line established the trend towards the larger wristwatches so popular in the watch industry today, and due to its complex watchmaking technology is an icon in the world of haute horlogerie. Watch connoisseurs appreciate the imposing size of these timepieces as well as the clearly organized dial with its characteristic railway-track-style chapter ring and Arabic numerals. The Portugieser line has always been defined by IWC-manufactured movements and sophisticated complications. The minute repeater, rattrapante or split-seconds hand and in-house movements with a 7- or 8-day power reserve certainly impressed upon their respective debuts. The most exclusive and complicated mechanical watch ever made by IWC is the Portugieser Sidérale Scafusia. This model marks the most outstanding moment so far in the history of the Portugieser family.