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From poor start to IWC's most popular line

IWC's Portugieser Perpetual Calendar.
Portugieser Chronograph
Portugieser Grande Complication

THE Portugieser is IWC's most popular watch line. You wouldn't have guessed it from its early history. The collection was started because two customers wanted a big stainless steel wrist watch with a movement that could match the accuracy of a marine chronometer. This was in the 1930s.