====== IWC 854 ======
Calibre **854** is an [[automatic]] watch movement from [[IWC]] in the 1960s.

IWC's main automatic movement for the late 1950s, [[IWC 853|Cal. 853/8531]], was updated around [[1963]] to become this Cal. 854. Although Cal. 853 and earlier IWC automatic movements measured 13 [[ligne]], Cal. 854 was slightly smaller at 12.5 ligne. Once again, a date version was also available, **Cal. 8541**.

Cal. 854 lasted into the [[quartz crisis]] and was the last of its line. From [[1975]], IWC used a modified [[Jaeger-LeCoultre]] movement, [[IWC 3254|Cal. 3254]], for higher-end watches and a modified [[ETA]] movement, [[IWC 375|Cal. 375]], or a quartz movement for lower-priced models.

Like all previous automatic IWC movements, going back to the original [[IWC 81|Cal. 81]], Cal. 854 features the patented [[Pellaton]] winding system.

Cal. 854 was available in 21, 23, and 25 jewel variants. The latter features an excenter winding mechanism with ruby rollers. It is adjusted by means of screws on the balance spokes. Some versions feature [[hacking seconds]].

Date on Cal. 8541 is quick-set by moving the time between 23 45 and 24 00, an unusually quick version of this feature.

The later variants of this movement, marked with the letter "B", feature 23 or 25 jewels.


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**Description:**
  * [[Automatic]] movement
  * [[Pellaton]] winding

**Functions:**
  * Hours, minutes, [[central seconds]]
  * Date (Cal. 8541)

**Data:**
  * 12.5 [[ligne]] (28.0 mm), 4.85 mm thick
  * 21/23/25 [[jewels]]
  * 19,800 A/h
  * [[Breguet]] hairspring
  * [[Power reserve]] 44 hours

**Production period:**
  * Predecessor [[IWC 853]]
  * Successor [[IWC 375]] ([[ETA 2892]]) or [[IWC 3254]] ([[JLC 889]])
  * [[1963]]-[[1974]]
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{{tag>Movements Automatic_movements Pellaton_movements IWC_calibres}}