The Seiko 5E31-6B30 is a watch model based on the 5E31 movement.
Parts List
| 270WA2SN01 | crystal - crystal |
| 25M20NA3 | crown |
| 0A2500N01 | case back gasket - rotating bezel gasket |
| GK34C | band - leather band |
| 1BB077L0BCA | others - hour hand |
| 2BB115L0BCA | others - minute hand |
| 0351624 | others - winding stem |
| 12ST06DA | others - second hand |
| 82812640 | others - case ring |
| 5E315 | others - machine code |
| 5E316B20XS14 | others - dial |
| 5E316B30 | others - case back |
| 5E316B30SA | others - case |
| 87020283 | others - back plate |
| A170BS | others - push pin |
| EZ0035B01 | others - crown and stem gasket |