The Seiko 2C21-5390 is a watch model based on the 2C21 movement.
Parts List
| K05N75JN00 | crystal - crystal |
| 30NA7NA1 | crown - crown |
| 0F160NA11 | case back gasket |
| DZ0065B01 | case back gasket - button gasket |
| ML46A | band - band |
| ML47A | band - band |
| 3BA075F1BNG | others - second hand |
| 07SC25NG | others - second hand |
| 07P49AAH | others - hour hand |
| 07P49AAM | others - minute hand |
| 07P49NGH | others - hour hand |
| 07P49NGM | others - minute hand |
| 1AC045A1BNG | others - hour hand |
| 2AC065A1BNG | others - minute hand |
| 0351225 | others - winding stem |
| 2C215390FA | others - case |
| 82721770 | others - case ring |
| 2C215390JF | others - case |
| 2C210980XN19 | others - dial |
| 2C210980XS19 | others - dial |
| 2C2110 | others - machine code |
| A110AS | others - push pin |
Caliber 2C21
