MIYOTA 8215 & 8205 Watch Movements
Technical Specifications and Usage Guide
General Specifications
| Specification | Value |
|---|---|
| Size (ligne) | 11 1/2" |
| Height (mm) | 5.67 |
| Accuracy (per Day) | -20 ~ +40 sec |
| Posture Difference | (under) 50 sec |
| Running Time | (approximately) 42 hours |
| Vibration Frequency (per Hour) | (vibration) 21600 |
| Jewels | 21 pcs |
| Lift Angle | 49 degree |
| Original Package | 100 pcs |
Clearance: Clearance changes are subject to the glass, case structure, and the length of the hand. Minimum clearance for the hand is 0.45mm, and for the movement is 0.25mm.
A diagram shows a watch movement with specified clearances for the hand (0.45mm min.) and the movement (0.25mm min.).
Component Details:
- Attached Stem: 065-212
- Screw for dial fix: 929-610
- Plastic holder: 500-710
Feature: Exchangeable with metal ring, casing clamps, and screws.
Availability: Gilt Version Available.
Time Setting
Setting the Time: To set the time, pull out the crown and turn it.
A diagram illustrates the process of setting the time.
Date and Day Setting
Setting the Date and Day:
- DO NOT set Date between 9:00pm – 1:00am.
- DO NOT set Day between 1:00am – 4:30am.
Diagrams show watch faces indicating the day and date display, with the 8215 and 8205 models both showing 'SUN 7'.
Time Measurement & Winding (Mechanical)
Accuracy: Measure accuracy within a lapse of 10~60 minutes from full winding with posture ①.
Posture Difference: Measure accuracy in the following 4 postures:
- Dial side up
- 6 o'clock side up
- 9 o'clock side up
- 3 o'clock side up
Diagrams illustrate the four measurement postures.
To Make Full-Winded
| Model(s) | Action |
|---|---|
| 90 / 91 | Turn the crown 40 times |
| 82 / 8N | Turn the crown 40 times |
| 6T | Turn the crown 20 times |
Winding Direction
Diagrams indicate the winding direction for '90/91/6T' and '82/8N' models.
