The Seiko 3F31-5A00 is a watch model based on the 3F31 movement.
Parts List
| SACW42SB01 | crystal - crystal |
| 30ML0NJ4 | crown - crown |
| 0A1800N01 | case back gasket |
| 0F180NA1S | case back gasket - case back gasket |
| 86582280 | crystal gasket - plastic gasket for crystal |
| DA25AW | band - band |
| 1BA045A0BAA | others - hour hand |
| 2AA065A0BCA | others - minute hand |
| A120BS | others - push pin (for lb) |
| 3F310A10XS13 | others - dial |
| 3F311 | others - machine code |
| 3F315A0071 | others - case |
| 3F315A0071A | others - case |
| 82831820 | others - case ring |
| 3F315A00 | others - case back |
| 3F315A0071B | others - case |
| 3F315A0071C | others - case |
| 0354735 | others - winding stem |
| 07SC06DS | others - second hand |
| EZ0035B01 | others - crown and stem gasket |