| 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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