| Manufacturer | Miyota |
| Caliber Number | 9100 |
| Movement Type | Automatic, self-winding mechanical |
| Lignes | 13.5”’ |
| Diameter |
30.2mm |
| Height | 5.52mm |
| Jewels | 26 |
| Vibrations Per Hour |
28,800 bph (4Hz) |
| Lift Angle |
51 degrees |
| Power Reserve |
40 hours |
| Anti-Shock System | Parashock |
| Winding Direction |
Uni-directional (clockwise) |
| Hand Windable? |
Yes |
| Stem | 065-A05 (tap 10) |
| Plastic Movement Holder | 500-002 |
| Dial Screws | 924-752 |
| Hands Count |
7 |
| Hand Sizes |
1.52mm / 1.0mm / 0.17mm |
| Hacking Seconds? |
Yes |
| Functions | Central hours; central minutes; central sweeping seconds; 24 hour subdial; day subdial; month subdial; date window at 4:30; power reserve indicator at 12:00 |
| Country of Manufacture | Japan |
| Known Models | Detomaso Forza XXL, TW Steel CEO Tech, too many to list (Add yours in the comments below…) |
The Miyota caliber 9100 is from the 9100 family with other calibers based off of this one. Miyota is owned by Citizen Watch.
Some of the topics covered in this caliber listing:
Miyota 9100 Family:
- 9100 – Hours, minutes, central sweep seconds, 24 hour subdial at 6:00, day of the week subdial at 9:00, month subdial at 3:00 (set with the pusher at 2:00), date window at 5:00, power reserve indicator at 12:00
- 9110 – Hours, minutes, central sweep seconds, 24 hour subdial at 6:00, day of the week subdial at 9:00, date window at 3:00, power reserve indicator at 12:00
- 9120 – Hours, minutes, central sweep seconds, 24 hour subdial at 6:00, day of the week subdial at 9:00, month subdial at 3:00 (set with the pusher at 2:00), date window at 5:00
- 9122 – Hours, minutes, central sweep seconds, day of the week subdial at 9:00, month subdial at 3:00 (set with the pusher at 2:00), date window at 6:00
- 9130 – Hours, minutes, central sweep seconds, date window at 6:00, power reserve indicator at 12:00
- 9132 – Hours, minutes, central sweep seconds, 24 hour subdial at 6:00, date window at 3:00, power reserve indicator at 12:00
Accuracy:
Miyota claims that the caliber 9100 offers accuracy of -10 ~ +30 seconds per day. This is measured within 10-60 minutes from a full wind via the crown. To fully wind the movement, turn the crown 40 times. The winding direction of the rotor is counterclockwise. A fully wound mainspring will give the watch about 40 hours of running time.
Replacement Prices:
Replacement prices were found online for $136.95.
Image Gallery:
Examples of watches with caliber 9100:
The photos in this listing are of a caliber 9100 found in this Detomaso Forza XXL Blackout. Some other watches with this movement:
Additional Resources:
