The Seiko 8523-503J is a watch model based on the 8523 movement.
Parts List
| SA3W05LN00 | crystal |
| 40MG3NS1 | crown |
| 40MG3NA1 | crown |
| 0G155BAA1 | case back gasket |
| EB0055B01 | others - crown and stem gasket |
Caliber 8523
Seiko 8523-503J Watch Guide
The Seiko 8523-503J is a watch model based on the 8523 movement.
| SA3W05LN00 | crystal |
| 40MG3NS1 | crown |
| 40MG3NA1 | crown |
| 0G155BAA1 | case back gasket |
| EB0055B01 | others - crown and stem gasket |