The Seiko S251-0020 is a watch model based on the S251 movement.
Parts List
| 0G378BA11 | case back gasket - case back gasket |
| DFZ4JC | band - band |
| DG98JC | band - resin band |
| S2510020N2C | others - case |
| S2510020N2D | others - case |
| S2510020N2E | others - case |
| 81621579 | others - bracelet fixing pin |
| S2510020N2B | others - case |
| 81518099 | others - case back screw |
| 81514639 | others - case back screw |
| 81180209 | others - bracelet fixing pipe |
| S2510020N2A | others - case |