BRANDS: Miyota
The 82/8N series of movements is the original automatic movement from Miyota, in production from 1976 through the present day. It operates at 21,600 A/h and most have 21 jewels. The automatic winding versions have uni-directional (counter-clockwise) winding.
Distinguishing features of the 82/8N series include a single central screw for the central winding rotor and a simple index for regulation. The balance wheel is located at 5:00 when viewed with the winding stem at 9:00 and is located with a clockwise cock.
All members of the Miyota 82 family have indirect central seconds, which causes a noticeable wobble to the central seconds hand. When struck, the seconds hand can appear to pause for up to 2 seconds due to slack in the movement.
The entire movement is held together with just 3 screws, aiding in construction but making repair more difficult.
Note that many Internet sites date the introduction of the Cal. 8200 to 1974, but the official Citizen catalog from 1979 specifically dates this movement to Shōwa 51.3, or March, 1976.
Current models are indicated in bold below.
| No Date | Date Only | Day-Date | |
| Hand Winding | 8270 8N33 SK | 8260 | |
| Automatic Central Seconds | 8228A OH 82S0 PS OH 8N24 SK 8N26 SK HH | 8210 8215 SR 821A | 8200 8203 8205 SR 820A 8285 SR OD |
| Automatic 24 Hour Hand | 8247 82D7 OH | 8217 | |
| Automatic Small Seconds | 8245 82S5 PS OH 8N40 PS | 8218 | |
| Automatic 24 Hour Hand Small Seconds | 82S7 PS OH | 8219 |
- OH = Open Heart at 7:00
- SK = Skeleton
- PS = Partial Skeleton
- HH = High Hands
- OD = Outer Date
- SR = Solid Rotor
| Calibre | Start Year | End Year | Jewels | Diameter (mm) | Height (mm) | Complications |
|---|---|---|---|---|---|---|
| Miyota 8205 | 1977 | 21 | 25.60 | 5.67 | Bilingual Day Wheel, Date, Day, Hand Winding, Quick Date Correction, Quick Day Correction | |
| Miyota 8215 | 1977 | Current | 21 | 25.60 | 5.67 | Date, Hacking Seconds, Hand Winding, Quick Date Correction |
| Miyota 8217 | 21 | 25.60 | 5.67 | 24 Hour Hand, Date, Hand Winding, Quick Date Correction | ||
| Miyota 8218 | 21 | 25.60 | 5.67 | Date, Hand Winding, Quick Date Correction | ||
| Miyota 8219 | 21 | 25.60 | 5.67 | 24 Hour Hand, Date, Hand Winding, Quick Date Correction | ||
| Miyota 8285 | 21 | 29.20 | 5.94 | Date, Day, Hand Winding, Outer Day Wheel, Quick Date Correction | ||
| Miyota 82S0 | 21 | 25.60 | 5.67 | Hand Winding | ||
| Miyota 82S7 | Current | 21 | 25.60 | 5.67 | 24 Hour Hand, Hand Winding | |
| Miyota 8N24 | 21 | 25.60 | 5.55 | Hand Winding | ||
| Miyota 8N40 | 21 | 25.60 | 5.55 | Hand Winding |
