Premium 21-Jewel Automatic Caliber • Hacking / Stop-Second Feature
Upgrade your watch modification, custom build, or repair project with the **Original Japanese Miyota Caliber 8N24**. This premium 21-jewel mechanical mechanism features a striking, fully skeletonized execution that puts the intricate gear work on full display, significantly boosting the luxury appeal and value of your timepiece.
Engineered by Citizen Watch Co. in Japan, this movement provides rock-solid reliability, smooth automatic winding, and a highly requested **Stop-Second (Hacking)** device for precision time-setting. Available in stunning modified colorways—including **Silver, Gold (Gilt Version), Blue, and Black**—to fit your specific design vision.
| Brand / Manufacturer | Miyota (Citizen Group, Made in Japan) |
| Caliber Number | 8N24 (Gilt version available) |
| Movement Type | Automatic Self-Winding & Hand-Windable |
| Jewel Count | 21 Jewels |
| Size / Lignes | 11 1/2''' (Diameter: 26.0mm) |
| Movement Height | 5.55 mm |
| Min. Case Dimensions | Diameter: 30.3mm / Thickness: 9.8mm |
| Frequency / Beat Rate | 21,600 bph / 3 Hz |
| Power Reserve | ~42 Hours |
| Factory Accuracy Rating | -20 to +40 seconds per day |
| Hacking / Stop Second | Yes (Supported) |
| Shock System | Parashock Anti-Shock System |
| Winding Direction | Counterclockwise (Rotor) |
| Hand Dimensions Required | 1.50mm (Hrs) / 1.0mm (Mins) / 0.17mm (Secs) — 3 Central Hands |
For seamless modification and component matching, use the following official part references:
Perfect drop-in replacement or upgrade caliber for premium skeleton configurations including: Fossil Heritage & Grant (Ref: ME3099), Bulova Harley-Davidson Series, Electricianz Hybrid Mechanical, TACS ATL, Aquacy Hei Matau Skeleton, Aragon Silverjet, DELTAt NBS MKI-SCS, and various custom boutique microbrand cases built around the standard Miyota 8-series dimensions.
1x Authentic Miyota 8N24 Skeleton Automatic Movement (In your selected color variation) + 1x Temporary operating stem.
⚠️ Watchmaker Notice: Mechanical movements are delicate, high-precision instruments. Professional installation by an experienced watchmaker or qualified builder is strongly advised. Returns cannot be accepted for components damaged due to incorrect handling or faulty installation.