Orient Caliber F6R42 Watch Movement

Brand	Orient
Caliber Number	F6R42
In-House?	Yes
Movement Type	Automatic, self-winding mechanical
Jewels	22
Beat Rate /Frequency	21,600 bph / 3 Hz
Lift Angle	Unconfirmed (Add to comments below…)
Power Reserve	~50 hours
Anti-Shock System	Seiko Diashock
Winding System	Magic Lever
Hand Windable?	Yes
Functions	Central hours; central minutes; central sweeping seconds; power reserve indicator at 12:00
Hacking Seconds?	Yes
Country of Manufacture	Made in Japan
Known Models	Orient Star Contemporary Open Heart Watch (Ref: RE-AT0003S, RE-AT0002E), Orient Star Classic Semi-Skeleton (Ref: RE-AT0203, RE-AT0201G, RE-AT0202E) (Please add your watch and more known models to the comments below…)

Orient caliber F6R42 is a self-winding automatic movement with a power reserve indicator at 12:00. Another notable feature of this movement is the open balance wheel (aka “open heart”) at 9:00.

As a member of the F6R4 family of Orient watch movements, the F6R42 does not have a calendar complication. Furthermore, it is a true no-date movement with only two crown positions: against the case (position 1) and pulled out one click to time-setting mode (position 2).

Orient makes their calibers in-house in Japan. The F6R42 is an evolution movement with up upgraded power reserve to 50 hours on a full wind. This calibre also includes popular functionality including the ability to manually wind the movement, as well as hacking seconds (Orient refers to this as a second hand halt mechanism).