| Brand | Orient (Seiko Epson) |
| Caliber Number | F7F44 |
| In-House? | Yes |
| Movement Type | Automatic, self-winding mechanical |
| Jewel Count | 24 jewels |
| Beat Rate / Frequency | 21,600 bph / 3 Hz |
| Lift Angle | Unconfirmed |
| Power Reserve | 50 hours |
| Rotor Winding Direction | Bi-directional (Magic Lever) |
| Hand-Windable? | Yes |
| Anti-Shock Device | Diashock |
| Hand Count | 4 |
| Functions | Central hours; central minutes; small running seconds at 6:00; power reserve indicator at 12:00; open balance wheel at 9:00 |
| Hacking Seconds? | Yes |
| Finishing | Damaskeening (stripes), chamfered edges |
| Country of Manufacture | Made in Japan |
| Known Models | Orient Star M34 F7 (Ref: RE-BY0004A, RE-BY0005A, RE-BY0007A, RE-BY0009A) (Add your watch to the comments below…) |
The Orient caliber F7F44 is an automatic watch movement with a power reserve indicator, small seconds complication, and a skeletonized balance wheel aka “open heart window” (as Orient refers to it).
The calibre F7F44 is found in Orients M34 F7 Semi Skeleton line of watches in the brand’s M Collection, introduced on September 6, 2024.
In Orient’s own words:
“The M34 F7 Semi Skeleton is powered by the automatic (with hand winding) in-house calibre F7F44 which provides high accuracy of +15 seconds to –5 seconds per day and power reserve of 50 hours. The movement with Geneva stripes and chamfer finish, is visible through the see- through sapphire crystal case back.”
Accuracy Rating:
According to Orient, the average accuracy of the cal. F7F44 is -5 to + 15 seconds per day in normal operating conditions.
Examples of watches with this movement:
Additional Resources:
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