The Seiko 3F31-5A10 is a watch model based on the 3F31 movement.
Parts List
| ESEW02SN01 | crystal - crystal |
| 30MK8NA4 | crown - crown |
| 0A1800N01 | case back gasket |
| DA04BW | band - band |
| DA04BW-BJ00 | clasp - buckle |
| 1BB047A0BAC | others - hour hand |
| 2AB070A0BCC | others - minute hand |
| A130AS | others - push pin (for lb) |
| 3F310A30XG14 | others - dial |
| 3F311 | others - machine code |
| 87020760 | others - back plate |
| 0354735 | others - winding stem |
| 3F315A1093 | others - case |
| 82832060 | others - case ring |
| 07SC06DG | others - second hand |
| EZ0035B01 | others - crown and stem gasket |