The Seiko 5931-5240 is a watch model based on the 5931 movement.
Parts List
| ES1W09HA00 | crystal |
| 45E09NS1 | crown |
| FH2930B0A | case back gasket |
| EZ0140B0A | others - crown and stem gasket |
| ES1W09HA00 | crystal |
| 45E09NS1 | crown |
| FH2930B0A | case back gasket |
| EZ0140B0A | others - crown and stem gasket |
Caliber 5931
