The Seiko 2C21-5220 is a watch model based on the 2C21 movement.
Parts List
| REAN63JN00 | crystal |
| 30N77NA1 | crown |
| 0G2000B01 | case back gasket |
| DZ0065B01 | case back gasket - button gasket |
| G5028G | band - metal band |
| G5028G-BK5G | clasp - clasp |
| 06P01DGH | hand - hour hand |
| 06P01DGM | hand - minute hand |
| 3BA075F1BNG | others - second hand |
| 06SC11NG | others - second hand |
| 2C210600XG14 | others - dial |
| 2C2110 | others - machine code |
| 2C211140XB14 | others - dial |
| 2C211140XG14 | others - dial |
| 2C21522025 | others - case |
| 82714790 | others - case ring |
| A110AS | others - push pin |
Caliber 2C21
