Orient Caliber F7F44

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:

• Official instruction manual (pdf)
• Press-Release: Orient Star Launches M34 F7 Semi Skeleton Models Inspired by the Aurora