IWC Portugieser

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In 1939, two businessmen from Portugal placed an order with IWC for a series of large wristwatches that were to run as precisely as a marine chronometer. The captains and officers of the Portuguese merchant navy wanted a “seriously big watch” to wear on their wrists.

The captains and officers of the Portuguese merchant navy wanted a “seriously big watch” to wear on their wrists. Schaffhausen’s design engineers decided to put the men’s pocket watch 74 calibre into a wristwatch case. The first Portugieser, Reference IW325, had a case diameter of 41.5 millimetres and far exceeded the dimensions of conventional wristwatches of the era.
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