The Seiko 2C21-0220 is a watch model based on the 2C21 movement.
Parts List
| 190N97JM10 | crystal - crystal |
| 30N77N01 | crown - crown |
| 0H1550B01 | case back gasket |
| DZ0065B01 | case back gasket - button gasket |
| HL35A | band - band |
| MK31D | band - band |
| 3BA075F1BNS | others - second hand |
| 3BA125F1BAB | others - second hand |
| 08PB7NBM | others - minute hand |
| 08SC29EB | others - second hand |
| 07SC43NS | others - second hand |
| 08PB7NBH | others - hour hand |
| 07P89AKH | others - hour hand |
| 07P89AKM | others - minute hand |
| 0351225 | others - winding stem |
| 82706930 | others - case ring |
| 2C210220HE | others - case |
| 2C210820XB19 | others - dial |
| 2C210821XB19 | others - dial |
| 2C2110 | others - machine code |
| 2C211530XS19 | others - dial |
| A120AS | others - push pin |
Caliber 2C21
