The Seiko 8S23-604A is a watch model based on the 8S23 movement.
Parts List
| 305W13LM01 | crystal |
| 35M81NS1 | crown |
| 0F270BAA3 | bezel gasket - bezel gasket |
| EB0055B01 | others - crown and stem gasket |
Other models with the same movement
| 8S23-6000 |
| 8S23-6010 |
| 8S23-6040 |
| 8S23-6050 |
| 8S23-605A |
| 8S23-6060 |
| 8S23-6070 |
| 8S23-6080 |
| 8S23-6090 |
| 8S23-6100 |
| 8S23-6110 |