Orient Caliber F6727 Watch Movement

Manufacturer	Orient (Seiko)
Caliber Number	F6727
In-House?	Yes
Movement Type	Automatic, self-winding mechanical
Diameter	(Add to comments below…)
Height	(Add to comments below…)
Jewels	22
Power Reserve	40 hours
Beat Rate / Frequency	21,600 bph / 3 Hz
Lift Angle	Unconfirmed
Anti-Shock System	Seiko Diashock
Hand Windable?	Yes
Functions	Central hours; central minutes; central sweep seconds; date at 3:00
Hacking Second?	Yes
Country of Manufacture	Made in Japan
Known Models	Orient M-Force AC0N (Ref: RA-AC0N01B10B, RA-AC0N02Y10B, RA-AC0N03E10B), Orient M-Force AC0L (Ref: RA-AC0L09R00B, RA-AC0L03B00B, RA-AC0L02R00B, RA-AC0L01B00B, RA-AC0L05G00B) (Add your watch in the comments below…)

Orient caliber F6727 is a self-winding automatic movement with 22 jewels. Orient makes their movements in-house in Japan. Unlike Orient movements in the past, the cal. F6727 features hacking seconds (Orient calls it “second-hand halt”) and hand-winding functionality.

The F6727 appears to be based on the more common Orient cal. F6722, but with additional anti-shock protections:

“The in house caliber F6727 is housed in a proprietary casing structure designed for shock absorption. It consists of a movement holder to reduce horizontal shifting and secure stability when the watch is subjected to external shocks, a boost up spring to protect from vertical shifting, and a collet to reduce shock-induced displacement of the hair spring attached to the balance wheel.” –The M-Force AC0N Has Arrived, Orient Watch USA (8/25/2021)

Accuracy:

Orient claims accuracy of the caliber F6727 movement to be within -15 second – +25 seconds per day. These ratings are based on the watch being at room temperature with the mainspring fully wound and the dial up position.

Orient suggests that deviations from the accuracy claims should not be regarded within one day but within a one week period of results.

From the Orient manual:

“In order to maintain the watch’s accuracy, we recommend wearing the watch at least 8 hours a day.”

Power Reserve:

The Orient caliber F6727 has a power reserve of approximately 40 hours. Winding the crown 30 times will wind the spring fully and achieve full power reserve.