The Seiko 5931-5100 is a watch model based on the 5931 movement.
Parts List
| SA8N21SN00 | crystal |
| 35N85DX5 | crown |
| 35N85DE5 | crown |
| 0H2370B02 | case back gasket |
| 0H2370N01 | case back gasket - case back gasket |
| DZ0065B01 | case back gasket - button gasket |
| YK10A | band - leather band |
| YK11A | band - leather band |
| A180CS | others - push pin |
Caliber 5931
