Miyota 821A (Citizen)
Mechanical
c. 1977
Self-winding (rotor)
Date
No photos yet
Notes
1977-
ball-bearing rotor
differences not known between 8215, 821A
Dimensions
| Width | 25.6 lignes (57.75 mm) |
|---|---|
| Height | 5.2 mm |
| Stem height | 2 mm |
| Hands (H × M × S) | 1.52 × 1 × 0.17 mm |
Technical data
| Beat rate | 21,600 vph (3 Hz) |
|---|---|
| Lift angle | — |
| Power reserve | 45 h |
| Jewels | — |
| Shock protection | — |
| Mobile stud carrier | No |
Complications
| Self winding | Rotor |
|---|---|
| Date | Yes (quick set) |
| Day | No |
| Hacking | No |
| Chronograph | No |
Mainspring
| GR code | — |
|---|---|
| Height | — |
| Thickness | — |
| Length | — |
| Barrel diameter | — |
Overview
| Type | Mechanical |
|---|---|
| Manufacturer | Miyota |
| Year | c. 1977 |
| Family | — |
| Clone of | — |
Documents
None
Updated 7 days ago · 0 revisions