====== Lemania 5100 ======
**Calibre 5100** is an [[automatic chronograph]] movement made by [[Lemania]] from [[1974]] through [[2002]].

===== Overview =====
The Lemania 5100 is a legendary workhorse of a movement, constructed from stamped steel, delrin plastic, and other simple materials. It was designed to compete with emerging inexpensive movements from [[Seiko]] and others, and to be cheap to assemble and service. It is an [[automatic chronograph]] like the contemporary [[Valjoux 7750]] and features a similar "6-9-12" arrangement of [[subdial]]s. One important difference is that the Lemania 5100 has [[chronograph minutes]] on the central axis along with [[chronograph seconds]], giving watches using this movement a distinctive "four-handed" look.

A 12-hour chronograph counter is at 6 00, [[small seconds]] at 9 00, and a [[24 hour]] subdial at 12 00. One or more of these subdials are sometimes omitted, further differentiating watches that use this movement. Perhaps the most unusual Lemania 5100 watch is the [[Sinn EZM 1]], with no [[subdial]]s at all and the crown and pushers located on the left side of the dial.

The Lemania 5100 was quite successful, outlasting the [[Valjoux 7750]] line in the late 1970s, but was unable to compete as movement decoration became more important. Unlike competing movements, the Lemania 5100 was not suitable for [[display caseback]]s and did not adapt well to additional [[complication]]s. Lemania's new corporate parent, [[ETA]], re-designed the more attractive and conventional predecessor [[Lemania 1340|Cal. 1340]] as [[Lemania 1350|Cal. 1350]] in [[1994]]. Production of Cal. 5100 ended in [[2002]] and watches that used it, including the famous [[Sinn 140|Sinn Model 140 "Space Chronograph"]] were unavailable once supplies were exhausted until alternatives like Sinn's [[SZ01]] could be developed.

In [[2008]], [[Tissot]] requested a low-cost mass-produced chronograph movement for entry-level Swiss watches. [[ETA]] created [[ETA C01.211|Cal. C01.211]] based on the Lemania 5100 design. Jewel count was reduced to 15, operation slowed to 21,600 A/h, and the minute counter was moved to the 12 00 position.

===== Specifications =====
Introduced in [[1974]], Cal. 5100 followed closely after the introduction of Lemania's similar [[Lemania 1340|Cal. 1340 family]]. Like that movement, it features an unusual arrangement of chronograph counters 

  * Central hour and minute hands, chronograph seconds, and 60 minute chronograph totaliser
  * 12-hour totaliser at 6 00
  * Small seconds at 9 00
  * 24 hour hand at 12 00
  * Day and date windows at 3 00

It has 17 [[jewels]], [[hacking seconds]], and power reserve of 48 hours, and operates at 28,800 A/h.

Cal. 5100's predecessor, [[Lemania 1340|Cal. 1340]], was refreshed and re-launched as a successor, [[Lemania 1350|Cal. 1350]], in [[1994]]. The Lemania 5100 design has been reused as the [[ETA C01.211]].

===== Versions =====
  * [[Omega]] [[Omega 1045|Cal. 1045]]
  * Lemania 5012 - 21,600 A/h version with no 24 hour register

===== External Links =====
  * [[http://www.woundforlife.com/2014/10/10/hall-fame-lemania-5100/|Hall of Fame: Lemania 5100]]
  * [[https://wornandwound.com/chronography-4-lemania-5100/|Chronography 4: Lemania 5100]]


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**Description:**
  * [[Self-winding]] movement, [[chronograph]]
  * [[KIF Ultraflex]] [[shock protection]]
  * [[Escapement]] stone lever
  * [[Yoke winding system]]

**Functions:**
  * Hours, Minutes
  * [[Small seconds]] at 9
  * Date indication with [[quickset]] feature
  * [[Balance wheel]] [[hacking seconds]]
  * [[Complication]] 12 hours counter at 6 h
  * 24-hours indication, day/date indication
  * [[Chronograph]] 12-hours counter, 60-minutes counter

**Data:**
  * 13¾ [[ligne]]s
  * D 31 mm, H 8.2 mm
  * 17 [[jewels]]
  * 28,800 A/h
  * Power reserve 48h

**Production period:**
  * Production [[1978]]-[[2002]]
  * Predecessor [[Lemania 1340|Cal. 1340]]
  * Successor [[ETA C01.211]], [[Lemania 1350]], [[Sinn]] [[SZ01]]
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{{tag>Movements Lemania_calibres Automatic_movements Chronograph_movements Automatic_chronograph_movements}}