====== IWC 94800 ======
**Cal. 94800** is a specialty high-end [[manufacture]] [[double barrel]] [[tourbillon]] movement produced by [[IWC]] since [[2013]].

===== Details =====
IWC has been transitioning to [[in-house]] movements since [[2000]], enhancing the reputation and technical features of their watches. Part of this development includes the production of specialty high-end movements. The [[IWC 94000|Cal. 94000 family]] is the basis for many of these since its launch in [[2011]]. It uses [[double barrel|two mainspring barrels]], providing power for complications including a [[tourbillon]] and specialty [[digital]] time display. This was a departure for the company, which had previously relied on a single barrel design for long power reserve movements but suffered poor [[isochronism]] as a result.

**Cal. 94800** debuted in [[2013]] powering the [[IWC Ingenieur Constant-Force Tourbillon 5900|Ingenieur Constant-Force Tourbillon, Ref. 5900]]. The two mainspring barrels are coupled, with a [[constant force]] mechanism integrated into the [[tourbillon]] to ensure stability of [[amplitude]]. This mechanism causes the tourbillon to advance once per second, even though the watch [[escapement]], running at 18,000 A/h, "ticks" five times per second. After 48 hours of runtime on a fully-wound mainspring, the constant-force mechanism disengages and the tourbillon reverts to 1/5 second jumps. This continues through 96 hours of runtime.

The [[tourbillon]] is located at 9 00 on the dial and provides the running seconds display. A double [[moon phase indicator]] at 1 00 is accurate for 577.5 years before needing correction. A 96 hour [[retrograde]] [[power reserve indicator]] is at 5 00. It is a large movement, measuring 37.8 mm in diameter though it is just 7.7 mm thick.

The movement was updated in [[2018]] as **Cal. 94805** with a single moon phase display for the [[IWC Portugieser Constant-Force Tourbillon 5902|Portugieser Constant-Force Tourbillon, Ref. 5902]].

===== Applications =====
  * Cal. 94800
    * [[IWC Ingenieur Constant-Force Tourbillon 5900]] (2013-2016)
  * Cal. 94805
    * [[IWC Portugieser Constant-Force Tourbillon 5902]] (2018)
    * [[IWC Big Pilot's Watch Constant-Force Tourbillon 5903]] (2019)


<WRAP ud ud_mov>

**Description:**
  * [[Hand winding]] [[double barrel]] [[constant-force]] [[tourbillon]] [[manufacture]] movement

**Functions:**
  * Hours, minutes central
  * [[Moon phase indicator]] at 1 00
  * [[Retrograde]] [[power reserve indicator]] at 5 00
  * [[Constant force]] [[tourbillon]] seconds at 9 00

**Data:**
  * Ø 37.8 mm
  * Height 7.7 mm
  * 41 [[jewels]]
  * 341 components
  * 18,000 A/h
  * [[Power reserve]] 96 hours

**Production period:**
  * [[2013]]-Present
</WRAP>
===== See Also =====
  * [[IWC 94000]]

===== Weblinks =====
  * [[https://www.iwc.com/us/en/calibre-family/94000.html|Calibre Family 94000]], iwc.com


{{tag>Movements Double_barrel_movements Tourbillon_movements IWC_calibres}}