====== RRM7309-CS ======

**RRM7309-CS** is a watch calibre by [[Ball Watch Company]].

It is an [[automatic]] mechanical movement, which is produced [[in-house]] and has [[chronometer]] precision. Complications are hours, minutes, sweep seconds and date. The [[power reserve]] is 80 hours.

In contrast to the calibre [[RRM7309-C]] this movement is equipped with an [[anti-magnetic]] [[silicon balance spring]].


<WRAP ud ud_mov>

**Description:**
  * [[Self-winding]] movement, chronometer, [[anti-magnetic]] [[silicon balance spring]]

**Functions:**
  * Hours, minutes, sweep seconds and date

**Data:**
  * Ø 34.24 mm, H 5.16 mm
  * 25 [[Jewels]] 
  * 28,800 A/h
</WRAP>

{{tag>Movements Automatic_movements Ball_calibres}}