The Seiko 8523-0090 is a watch model based on the 8523 movement.
Parts List
| 195W43HA00 | crystal |
| 40E11NS1 | crown - crown |
| 40E11NA1 | crown - crown |
| FE203BAA1 | case back gasket |
| 86174340 | crystal gasket |
| EB0055B0A | others - crown and stem gasket |
Caliber 8523
Seiko 8523-0090 Watch Guide