The Seiko 3F31-0030 is a watch model based on the 3F31 movement.
Parts List
| 185P17SN02 | crystal |
| 30E33NA1 | crown |
| 0F175BAA1 | case back gasket |
| 0F175BAA5 | case back gasket - case back gasket |
| AC004BAA1 | case back gasket - crown and stem gasket |
| 86571670 | crystal gasket |
| HB16B | band - metal band |
| HB17B | band - metal band |
| 1AB050A1BNG | others - hour hand |
| 81182699 | others - bracelet fixing pipe |
| 81609399 | others - bracelet fixing pin |
| 0354735 | others - winding stem |
| 82833100 | others - case ring |
| 81609619 | others - bracelet fixing pin |
| 3F310030 | others - case back |
| 3F3100306Y | others - case |
| 3F310030SA | others - case |
| 3F310060XA14 | others - dial |
| 3F310070XG14 | others - dial |
| 3F311 | others - machine code |
| 2AB075A1BNG | others - minute hand |
| 1AC055A1BNG | others - hour hand |
| 2AC080A1BNG | others - minute hand |
| 3DA072AABDG | others - second hand |
| 3DA075AABDG | others - second hand |