Seiko 8223A – Parts List Overview

1. Main Plate

   • The base structure holding all components.

2. Quartz Crystal

   • Regulates timing frequency.

3. Integrated Circuit (IC)

   • Controls the quartz oscillator and motor functions.

4. Stepping Motor

   • Converts electrical impulses into mechanical movement.

5. Gear Train

   • Includes pinions and wheels for driving the hour, minute, and second hands.

6. Hands

   • Hour hand

   • Minute hand

   • Central seconds hand

7. Date Driving Wheel

   • Drives the date change mechanism.

8. Date Disc

   • Displays the date through the date window.

9. Crown and Stem Assembly

   • For manual time and date setting.

10. Setting Lever

    • Engages the crown functions.

11. Battery Contact Springs

    • Conduct electricity from the battery to the movement.

12. Battery Clamp

    • Holds the battery securely in place.

13. Dial

    • Faceplate with hour markers.

14. Rotor (in some quartz movements, if applicable)

    • N/A in typical quartz analog calibers like 8223A.

15. Shock Absorber Components

    • Protects movement from mechanical shocks.

16. Gaskets and Seals

    • Ensures water and dust resistance.

Notes:

• The 8223A is a basic quartz analog movement without complications such as chronographs or alarms, so the parts list is simpler than multi-function quartz calibers.

• For exact spare part numbers and availability, consulting official Seiko technical manuals or authorized service centers is recommended.

• Components like the battery (typically SR927W) are replaceable without specialized tools.

• The gear train and stepping motor are critical for precise hand movement.