The Seiko 2C21-5500 is a watch model based on the 2C21 movement.
Parts List
| REDN37JN01 | crystal - crystal |
| 40MS3NG1 | crown - crown |
| DZ0065B01 | case back gasket - button gasket |
| 0G2070B01 | case back gasket |
| 0D205BA11 | case back gasket |
| ZK49A | band - band |
| 3BA075F1BNG | others - second hand |
| 06P41AAH | others - hour hand |
| 06P41AAM | others - minute hand |
| 0351225 | others - winding stem |
| 06SC11NG | others - second hand |
| 2C21550025 | others - case |
| 82731390 | others - case ring |
| 2C2110 | others - machine code |
| 2C211230XS19 | others - dial |
| A110AS | others - push pin |
Caliber 2C21
