Calibre 98000 is a family of classic watch movements produced by IWC since the 1930s.

IWC introduced the hunter pocket watch movement Cal. 98, in the 1930s. But it became well known as the movement inside the famous Portugieser wrist watches, produced in limited numbers that decade.

IWC brought back the movement as Cal. 982 in 1977 for the “German Edition” Portugieser, produced until 1981. In 1993, IWC revived the classic movement as Cal. 9828. This modern development added shock resistance to the balance.

Cal. 98290 is a modern incarnation of the classic Cal. 98. It features the elongated adjustment index of early pocket watch movements along with a modern Glucydur balance.

• Cal. 98 (1930s)
• Cal. 982 (1977-1981)
• Cal. 9828 (1993-2002)
• Cal. 98245 (2007-2009) - Regulator display (hours at 12 00, seconds at 6 00, central minute hand)
• Cal. 98290
• Cal. 98295
  • IWC Portugieser Hand-Wound 5445 (2008-2012)
  • IWC Portugieser Hand-Wound 5454 (2010-2013)
• Cal. 98300 - Taller cannon pinion
  • IWC Portugieser Hand-Wound 5454 (2010-2014)
  • IWC Pilot's Watch Hand-Wound 3254 (2008-2013)
  • IWC Pilot's Watch Heritage 55 5104 (2016)
• Cal. 98800 (1984-2012) - Moon phase indicator at 12 00
  • IWC Portofino Hand-Wound 5448 (2008-2012)
• Cal. 98900 - Flying minute tourbillon at 9 00
  • IWC Portugieser Tourbillon Hand-Wound 5447 (2010-2012)
  • IWC Portugieser Tourbillon Hand-Wound 5463 (2013-present)
• Cal. 98950 - Minute repeater
  • IWC Portugieser Minute Repeater 5449 (2009-2016)