The 98 calibre, which was manufactured from the mid-1930s for the hunter pocket watch, has been regularly improved by IWC for over 80 years. Since it is so ideally suited for large hand-wound wristwatches, it is no coincidence that it is very closely associated with the story of the Portuguese wristwatches. One of the highlights in the calibre’s history was the anniversary Portuguese wristwatch unveiled in 1993 with the 9828 calibre, which among other things featured a balance with shock-resistance. With an elongated index and a modern shock-absorbing system, the 98290 calibre, first used in the Portuguese F. A. Jones in 2005, combines tradition and technological progress. Movements from the 98000-calibre family are also found in the Portuguese Minute Repeater and the Portuguese Tourbillon Hand-Wound.