The Seiko 2C21-5380 is a watch model based on the 2C21 movement.
Parts List
| ESXN39JN00 | crystal - crystal |
| 30NA7NS1 | crown - crown |
| 0G1890B01 | case back gasket |
| DZ0065B01 | case back gasket - button gasket |
| DZ46A | band - band |
| 3BA075F1BNG | others - second hand |
| 1AA032A1BNG | others - hour hand |
| 2AA052A1BNG | others - minute hand |
| 05P01NGH | others - hour hand |
| 81606439 | others - bracelet fixing pin |
| 81180229 | others - bracelet fixing pipe |
| 0351225 | others - winding stem |
| 2C2153802E | others - case |
| 82721830 | others - case ring |
| 2C210970XS14 | others - dial |
| 2C2110 | others - machine code |
| 05P01NGM | others - minute hand |
| 07SC04NG | others - second hand |
| 1AA035A1BNG | others - hour hand |
Caliber 2C21
