The Seiko 2C21-5010 is a watch model based on the 2C21 movement.
Parts List
| K04N85JN00 | crystal - crystal |
| 30N77NA1 | crown |
| 30N77NS1 | crown |
| 0H1550B01 | case back gasket |
| DZ0065B01 | case back gasket - button gasket |
| ML31A | band - band |
| ML32A | band - band |
| 07S25DGH | others - hour hand |
| 07S25DGM | others - minute hand |
| 07SS03NG | others - second hand |
| 83139510 | others - case ring |
| 2C210360XB14 | others - dial |
| 2C210360XG14 | others - dial |
| 2C2110 | others - machine code |
| A110AS | others - push pin |
| 2C21501025 | others - case |
| 0351225 | others - winding stem |
Caliber 2C21
