| Brand | Orient |
| Caliber Number | F4902 |
| In-House? |
Yes |
| Movement Type | Automatic |
| Jewels | 21 |
| Vibrations Per Hour |
21,600 bph |
| Anti-Shock System | Seiko Diashock |
| Winding System |
Magic Lever |
| Power Reserve |
~40 hours |
| Hand Windable? |
No |
| Hacking? | No |
| Lift Angle | (Add to comments below…) |
| Functions | Central hours, central minutes, central sweeping seconds, day/date at 3:00 |
| Country of Manufacture | Japan |
| Known Models | TriStar DENEB from the Tri-Star Collection (Please add your watch and more known models to the comments below…) |
The Orient caliber F4902 is a self-winding automatic movement with 21 jewels. Orient makes their movements in-house in Japan. This is a non-hacking and non-handwinding movement. You may have seen other sites list this movement incorrectly as caliber F49-02 or F.4902, but Orient officially writes the caliber number as F4902.
F4902 VS 46943:
The Orient caliber F4902 is said to be an upgrade to the caliber 46943. The main difference is that the older 46943 has a pusher on the side (2:00) to change the calendar (day of the week), while the newer F4902 calendar can be corrected via the crown.
Power Reserve:
The Orient caliber F4902 has a power reserve of 40 or more hours.
Setting the date:
Avoid setting the date on your F4902 watch within the hours of 8:00pm to 4:00am.
Additional Resources:
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