====== IWC 94900 ======
**Cal. 94900** is a specialty high-end [[manufacture]] [[double barrel]] [[tourbillon]] movement produced by [[IWC]] since [[2012]].

===== 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. 94900** debuted in [[2012]] powering the [[IWC Portugieser Sidérale Scafusia 5041]]. The two mainspring barrels are coupled, with a [[constant force]] mechanism integrated into the [[tourbillon]] to ensure stability of [[amplitude]]. The watch also features a [[perpetual calendar]] mechanism with a [[sidereal]] time display on the reverse.

The [[tourbillon]] is located at 9 00 on the dial and provides the running seconds display. A [[subdial]] at 12 00 on the dial shows [[sidereal time]] with its own hour and minute hand. A 96 hour [[retrograde]] [[power reserve indicator]] is at 4 30. The reverse side shows [[perpetual calendar]] date with [[day of year]] and [[leap year indicator]]. It includes a detailed celestial chart with the horizon, sunrise and sunset time, ecliptic, and celestial equator.

===== Applications =====
  * [[IWC Portugieser Sidérale Scafusia 5041]] (2012-2016)


<WRAP ud ud_mov>

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

**Functions:**
  * Front 
  * Hours, minutes central
  * [[Retrograde]] [[power reserve indicator]] at 4 30
  * [[Constant force]] [[tourbillon]] seconds at 9 00
  * [[Sidereal]] hour and minutes at 12 00
  * Reverse 
  * Celestial chart
  * Horizon
  * [[Perpetual calendar]]
  * Mean solar time
  * Mean [[sidereal time]]
  * Sunrise and sunset time
  * [[Day/night indicator|Day, night, and twilight display]]
  * Ecliptic
  * Celestial equator
  * Correctors

**Data:**
  * Ø 37.8 mm
  * 56 [[jewels]]
  * 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 Perpetual_calendar_movements Sidereal_time_movements IWC_calibres}}