====== JLC 481 ======
The **Calibre 481** is an [[automatic]] movement with [[power reserve indicator]] from [[Jaeger-LeCoultre]].

Introduced in [[1948]], Calibre 481 introduced a signature [[complication]] to the market the [[power reserve indicator]] or "[[Jaeger-LeCoultre Réserve de Marche|Réserve de Marche]]". It evolved from the first automatic movement from Jaeger-LeCoultre, the [[JLC 476]] and features [[bumper]] [[automatic]] winding.

The JLC 481 was introduced in the [[Jaeger-LeCoultre Powerwind]], Ref E 163, and was the first production watch from any company with a [[power reserve indicator]]. Although the movement has been updated, this product line has continued to today, with the name [[Jaeger-LeCoultre Powermatic|Powermatic]], [[Jaeger-LeCoultre Futurematic|Futurematic]], and [[Jaeger LeCoultre Réserve de Marche|Réserve de Marche]].

The signature power reserve indicator disc is located at 12 00 on the movement. It is marked with numerals for "0 • 10 • 20 • 30 • 40" with a "red zone" from about 14 on this scale to well below "0". The disc rotates counter-clockwise. The "481" marking is difficult to see as it is located below the [[balance wheel]]. The [[bumper]] [[rotor]] has two springs; one fixed to the rotor and another attached to the bumper.

===== See also =====
  * [[JLC 476]]

===== External links =====
  * [[http://jlc.watchprosite.com/show-forumpost/fi-2/pi-5969083/ti-875793/s-0/|An interesting page of JLC history: Automatic watches]]


<WRAP ud ud_mov>

**Manufacturer:**
  * [[Jaeger-LeCoultre]]

**Description:**
  * [[Bumper]] [[automatic]] movement

**Functions:**
  * Hour, minute hands
  * [[Central seconds]]
  * [[Power reserve indicator]] disc

**Data:**
  * 17 [[jewels]]
  * 18,000 A/h
  * Power reserve 40 hours

**Production period:**
  * Related [[JLC 476]]
  * Successor [[JLC 497]]
  * Production [[1948]]-
</WRAP>

{{tag>Movements Automatic_movements Bumper_movements Jaeger-LeCoultre_calibres}}