Orient Star Caliber F6F44

Brand	Orient Star
Caliber Number	F6F44
Manufacturer	Epson (Seiko Instruments Inc.)
Movement Type	Automatic, self-winding mechanical
Jewel Count	24
Beat Rate	21,600 vph, 3 Hz
Lift Angle	Unconfirmed
Accuracy Rating	-15 ~ +25 sec/day
Power Reserve	50 hours
Hand-Windable?	Yes
Anti-Shock Device	Diashock
Hand Count	4
Functions	Central hours; central minutes; small seconds subdial at 6:00; power reserve indicator at 12:00; open balance wheel at 9:00
Hacking Seconds?	Yes
Country of Manufacture	Made in Japan
Known Models	Orient Star “Modern Skeleton” (Ref: RE-AV0113S, RE-AV0114E, RE-AV0115B), Orient Star Open Heart 70th Anniversary (Ref: RE-AV0B01S00B) (Add your watch to the comments below…)

The Orient Star caliber F6F44 is an automatic watch movement with an open (aka open-heart or skeletonized) balance wheel and a power reserve indicator.

Orient Star officially refers to watches with this movement as: “Mechanical Watch, Power Reserve Indicator, Automatic & Hand Winding Mechanism”.

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