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Brand: | Miyota | 
|
|---|---|---|---|
| Family: | |||
| Height: | 5.67 mm | ||
| Jewels: | 21 | ||
| Reserve: | 42 hours | ||
| Frequency: | 21600 A/h | ||
| Winding: | Automatic, Central Rotor Automatic Winding, Counter-Clockwise Automatic Winding, Uni-Directional Automatic Winding | ||
| Diameter: | 25.60 mm (11.5 ligne) | ||
| Complications: | Bilingual Day Wheel, Date, Day, Hand Winding, Quick Date Correction, Quick Day Correction | ||
| Hands: | Central Hour Hand, Central Minute Hand, Central Seconds Hand, Date Window at 3:00, Day Window at 3:00 | ||
| Distinguishing Technical Characteristics | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
 Central-Rotor Automatic  Clockwise Balance Cock |
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| Production: 1977 – | |||||||||||
| 1910s | 1920s | 1930s | 1940s | 1950s | 1960s | 1970s | 1980s | 1990s | 2000s | 2010s | 2020s |
Part of the Miyota Cal. 8200 family, Cal. 8205 is a day-date central seconds automatic movement produced since 1977. Cal. 820A is substantially similar but better finished, with ribbing on the reverse side and a slotted rotor. A gilt version of each is also available.
These movements feature a bilingual day wheel. Offerings include English/Japanese, English/Spanish, English/French, English/German, English/Portuguese, and English/Chinese. Additionally, vertical (window at 6:00) versions are available in English/Spanish and English/Chinese.
All members of the Miyota 8200 family have indirect 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.
Similar movements include Cal. 8200, 8200A, 8203A, and 8205A. Cal. 8285 is a related day-date movement with an outer date wheel and larger main plate.
| 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
