The Seiko 8A21-0010 is a watch model based on the 8A21 movement.
Parts List
| 485N01AF10 | crystal - crystal (organic) |
| 0F170BAA1 | case back gasket |
| EJ0165B01 | case back gasket - button gasket |
| 0K4980B01 | case back gasket - case back gasket |
| 80608894 | pusher - button |
| 80608914 | pusher - button |
| BZA04N | band - band |
| AN15A | band - other band |
| 30SG01XB | others - second hand |
| 07G076B | others - sub hand |
| 07G05XBM | others - minute hand |
| 07G05XBH | others - hour hand |
| 83200299 | others - button spring clip |
| 81504359 | others - case back screw |
| 8A210010A01 | others - case |
| 8A210010 | others - case back |
| 8259903A | others - battery hatch |
| 81504379 | others - screw |
| 8A210010A1 | others - case |
| 8A210010XS19 | others - dial |
| 8A210020XS19 | others - dial |
| 8A210030XE19 | others - dial |
| 8A2160 | others - machine code |
| 8259905A | others - (batteriedeckel) |
| 81350189 | others - button spring |
| 8259905C | others - (batteriedeckel) |