The Seiko 5P31-6120 is a watch model based on the 5P31 movement.
Parts List
| 250P05HN03 | crystal |
| 250W27HN01 | crystal |
| 32M25NS1 | crown |
| 0F240BAA3 | case back gasket - case back gasket |
| 0F210BAA3 | case back gasket |
| 86573510 | crystal gasket |
| 86583670 | bezel gasket |
| YA46A | band - metal band |
| 10T47NGH | others - hour hand |
| 10T47NGM | others - minute hand |
| 11SC41T1 | others - second hand |
| 3AA125F1ANG | others - second hand |
| A120BS | others - push pin (for lb) |
| 5P31612061 | others - case |
| 5P316130XB14 | others - dial |
| 82340059 | others - bezel |
| 82732850 | others - case ring |
| 0351671 | others - winding stem |
| EB0055B01 | others - crown and stem gasket |
| 250P05HN03 | crystal |
| 250W27HN01 | crystal |
| 32M25NS1 | crown |
| 0F240BAA3 | case back gasket - case back gasket |
| 0F210BAA3 | case back gasket |
| 86573510 | crystal gasket |
| 86583670 | bezel gasket |
| YA46A | band - metal band |
| 10T47NGH | others - hour hand |
| 10T47NGM | others - minute hand |
| 11SC41T1 | others - second hand |
| 3AA125F1ANG | others - second hand |
| A120BS | others - push pin (for lb) |
| 5P31612061 | others - case |
| 5P316130XB14 | others - dial |
| 82340059 | others - bezel |
| 82732850 | others - case ring |
| 0351671 | others - winding stem |
| EB0055B01 | others - crown and stem gasket |